TSpectrum3.cxx

Go to the documentation of this file.

// @(#)root/spectrum:$Id$
// Author: Miroslav Morhac   25/09/2006
 
/** \class TSpectrum3
    \ingroup Spectrum
    \brief Advanced 3-dimensional spectra processing functions
    \author Miroslav Morhac
 
 \legacy{TSpectrum3, For modeling a spectrum fitting and estimating the background one can use RooFit while for deconvolution and unfolding one can use TUnfold.}
 
  This class contains advanced spectra processing functions.
 
 - Three-dimensional background estimation functions
 - Three-dimensional smoothing functions
 - Three-dimensional deconvolution functions
 - Three-dimensional peak search functions
 
 
 The algorithms in this class have been published in the following
 references:
 
  [1]  M.Morhac et al.: Background elimination methods for
  multidimensional coincidence gamma-ray spectra. Nuclear
  Instruments and Methods in Physics Research A 401 (1997) 113-132.
 
  [2]  M.Morhac et al.: Efficient one- and two-dimensional Gold
  deconvolution and its application to gamma-ray spectra
  decomposition. Nuclear Instruments and Methods in Physics
  Research A 401 (1997) 385-408.
 
  [3] M. Morhac et al.: Efficient algorithm of multidimensional
  deconvolution and its application to nuclear data processing. Digital
  Signal Processing, Vol. 13, No. 1, (2003), 144-171.
 
  [4]  M.Morhac et al.: Identification of peaks in multidimensional
  coincidence gamma-ray spectra. Nuclear Instruments and Methods in
  Research Physics A  443(2000), 108-125.
 
  These NIM papers are also available as Postscript files from:
 
 - [SpectrumDec.ps.gz](ftp://root.cern/root/SpectrumDec.ps.gz)
 - [SpectrumSrc.ps.gz](ftp://root.cern/root/SpectrumSrc.ps.gz)
 - [SpectrumBck.ps.gz](ftp://root.cern/root/SpectrumBck.ps.gz)
 
 See also the
 [online documentation](https://root.cern/guides/tspectrum-manual) and
 [tutorials](https://root.cern/doc/master/group__tutorial__spectrum.html).
*/
 
#include "TSpectrum3.h"
#include "TH3.h"
#include "TMath.h"
#include "TVirtualPad.h"
#define PEAK_WINDOW 1024
 
 
////////////////////////////////////////////////////////////////////////////////
/// Constructor.
 
TSpectrum3::TSpectrum3() :TNamed("Spectrum", "Miroslav Morhac peak finder")
{
   Int_t n = 100;
   fMaxPeaks   = n;
   fPosition   = new Double_t[n];
   fPositionX  = new Double_t[n];
   fPositionY  = new Double_t[n];
   fPositionZ  = new Double_t[n];
   fResolution = 1;
   fHistogram  = nullptr;
   fNPeaks     = 0;
}
 
 
////////////////////////////////////////////////////////////////////////////////
///  - maxpositions:  maximum number of peaks
///  - resolution:    *NOT USED* determines resolution of the neighbouring peaks
///                   default value is 1 correspond to 3 sigma distance
///                   between peaks. Higher values allow higher resolution
///                   (smaller distance between peaks.
///                   May be set later through SetResolution.
 
TSpectrum3::TSpectrum3(Int_t maxpositions, Double_t resolution) :TNamed("Spectrum", "Miroslav Morhac peak finder")
{
   Int_t n = TMath::Max(maxpositions, 100);
   fMaxPeaks  = n;
   fPosition  = new Double_t[n];
   fPositionX = new Double_t[n];
   fPositionY = new Double_t[n];
   fPositionZ = new Double_t[n];
   fHistogram = nullptr;
   fNPeaks    = 0;
   SetResolution(resolution);
}
 
 
////////////////////////////////////////////////////////////////////////////////
/// Destructor.
 
TSpectrum3::~TSpectrum3()
{
   delete [] fPosition;
   delete [] fPositionX;
   delete [] fPositionY;
   delete [] fPositionZ;
   delete    fHistogram;
}
 
////////////////////////////////////////////////////////////////////////////////
///   This function calculates background spectrum from source in h.
///   The result is placed in the vector pointed by spectrum pointer.
///
///   Function parameters:
///   - h: input 3-d histogram
///   - nIterX, nIterY, nIterZ, iterations for X and Y and Z axes
///     Increasing number of iterations make the result smoother and lower.
///   - option: may contain one of the following options
///      - direction of change of clipping window
///               - possible values=kBackIncreasingWindow
///                                 kBackDecreasingWindow
///      - filterType-determines the algorithm of the filtering
///               - possible values=kBackSuccessiveFiltering
///                                 kBackOneStepFiltering
///      - "same" : if this option is specified, the resulting background
///                 histogram is superimposed on the picture in the current pad.
///                 Default is "goff" ie no graphics output
 
TH1 *TSpectrum3::Background(const TH1 *h, Int_t nIterX, Int_t nIterY, Int_t nIterZ, Option_t *option)
{
   if (h == nullptr)
      return nullptr;
   Int_t dimension = h->GetDimension();
   if (dimension != 3) {
      Error("Background", "Only implemented for 3-d histograms");
      return nullptr;
   }
   TString opt = option;
   opt.ToLower();
 
   // set options
   Int_t direction = kBackDecreasingWindow;
   if (opt.Contains("backincreasingwindow"))
      direction = kBackIncreasingWindow;
   Int_t filterType = kBackSuccessiveFiltering;
   if (opt.Contains("backonestepfiltering"))
      filterType = kBackOneStepFiltering;
   Int_t firstX = h->GetXaxis()->GetFirst();
   Int_t lastX = h->GetXaxis()->GetLast();
   Int_t sizeX = lastX - firstX + 1;
   Int_t firstY = h->GetYaxis()->GetFirst();
   Int_t lastY = h->GetYaxis()->GetLast();
   Int_t sizeY = lastY - firstY + 1;
   Int_t firstZ = h->GetZaxis()->GetFirst();
   Int_t lastZ = h->GetZaxis()->GetLast();
   Int_t sizeZ = lastZ - firstZ + 1;
   Int_t i, j, k;
   Double_t ***source = new Double_t **[sizeX];
   for (i = 0; i < sizeX; i++) {
      source[i] = new Double_t *[sizeY];
      for (j = 0; j < sizeY; j++) {
         source[i][j] = new Double_t[sizeZ];
         for (k = 0; k < sizeZ; k++)
            source[i][j][k] = h->GetBinContent(i + firstX, j + firstY, k + firstZ);
      }
   }
 
   // find background (source is input and in output contains the background
   Background(source, sizeX, sizeY, sizeZ, nIterX, nIterY, nIterZ, direction, filterType);
 
   // create output histogram containing background
   // only bins in the range of the input histogram are filled
   Int_t nch = strlen(h->GetName());
   char *hbname = new char[nch + 20];
   snprintf(hbname, nch + 20, "%s_background", h->GetName());
   TH3 *hb = (TH3 *)h->Clone(hbname);
   hb->Reset();
   hb->GetListOfFunctions()->Delete();
   for (i = 0; i < sizeX; i++)
      for (j = 0; j < sizeY; j++)
         for (k = 0; k < sizeZ; k++)
            hb->SetBinContent(i + firstX, j + firstY, k + firstZ, source[i][j][k]);
   hb->SetEntries(sizeX * sizeY * sizeZ);
 
   // if option "same is specified, draw the result in the pad
   if (opt.Contains("same")) {
      if (gPad)
         delete gPad->GetPrimitive(hbname);
      hb->Draw("same");
   }
   for (i = 0; i < sizeX; i++) {
      for (j = 0; j < sizeY; j++) {
         delete[] source[i][j];
      }
      delete[] source[i];
   }
   delete[] source;
   delete[] hbname;
   return hb;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Print the array of positions
 
void TSpectrum3::Print(Option_t *) const
{
   printf("\nNumber of positions = %d\n",fNPeaks);
   for (Int_t i=0;i<fNPeaks;i++) {
      printf(" x[%d] = %g, y[%d] = %g, z[%d] = %g\n",i,fPositionX[i],i,fPositionY[i],i,fPositionZ[i]);
   }
}
 
 
 
////////////////////////////////////////////////////////////////////////////////
/// This function searches for peaks in source spectrum in hin
/// The number of found peaks and their positions are written into
/// the members fNpeaks and fPositionX.
///
/// Function parameters:
///  - hin:       pointer to the histogram of source spectrum
///  - sigma:   sigma of searched peaks, for details we refer to manual
///            Note that sigma is in number of bins
///  - threshold: (default=0.05)  peaks with amplitude less than
///       threshold*highest_peak are discarded.
///
///   if option is not equal to "goff" (goff is the default), then
///   a polymarker object is created and added to the list of functions of
///   the histogram. The histogram is drawn with the specified option and
///   the polymarker object drawn on top of the histogram.
///   The polymarker coordinates correspond to the npeaks peaks found in
///   the histogram.
///   A pointer to the polymarker object can be retrieved later via:
/// ~~~ {.cpp}
///    TList *functions = hin->GetListOfFunctions();
///    TPolyMarker *pm = (TPolyMarker*)functions->FindObject("TPolyMarker")
/// ~~~
 
Int_t TSpectrum3::Search(const TH1 * hin, Double_t sigma,
                             Option_t * option, Double_t threshold)
{
   if (hin == nullptr)
      return 0;
   Int_t dimension = hin->GetDimension();
   if (dimension != 3) {
      Error("Search", "Must be a 3-d histogram");
      return 0;
   }
 
   Int_t sizex = hin->GetXaxis()->GetNbins();
   Int_t sizey = hin->GetYaxis()->GetNbins();
   Int_t sizez = hin->GetZaxis()->GetNbins();
   Int_t i, j, k, binx,biny,binz, npeaks;
   Double_t*** source = new Double_t**[sizex];
   Double_t*** dest   = new Double_t**[sizex];
   for (i = 0; i < sizex; i++) {
      source[i] = new Double_t*[sizey];
      dest[i]   = new Double_t*[sizey];
      for (j = 0; j < sizey; j++) {
         source[i][j] = new Double_t[sizez];
         dest[i][j]   = new Double_t[sizez];
         for (k = 0; k < sizez; k++)
            source[i][j][k] = (Double_t) hin->GetBinContent(i + 1, j + 1, k + 1);
      }
   }
   //the smoothing option is used for 1-d but not for 2-d histograms
   npeaks = SearchHighRes((const Double_t***)source, dest, sizex, sizey, sizez, sigma, 100*threshold, kTRUE, 3, kFALSE, 3);
 
   //The logic in the loop should be improved to use the fact
   //that fPositionX,Y give a precise position inside a bin.
   //The current algorithm takes the center of the bin only.
   for (i = 0; i < npeaks; i++) {
      binx = 1 + Int_t(fPositionX[i] + 0.5);
      biny = 1 + Int_t(fPositionY[i] + 0.5);
      binz = 1 + Int_t(fPositionZ[i] + 0.5);
      fPositionX[i] = hin->GetXaxis()->GetBinCenter(binx);
      fPositionY[i] = hin->GetYaxis()->GetBinCenter(biny);
      fPositionZ[i] = hin->GetZaxis()->GetBinCenter(binz);
   }
   for (i = 0; i < sizex; i++) {
      for (j = 0; j < sizey; j++){
         delete [] source[i][j];
         delete [] dest[i][j];
      }
      delete [] source[i];
      delete [] dest[i];
   }
   delete [] source;
   delete [] dest;
 
   if (strstr(option, "goff"))
      return npeaks;
   if (!npeaks) return 0;
   return npeaks;
}
 
 
////////////////////////////////////////////////////////////////////////////////
/// *NOT USED*
///  resolution: determines resolution of the neighbouring peaks
///              default value is 1 correspond to 3 sigma distance
///              between peaks. Higher values allow higher resolution
///              (smaller distance between peaks.
///              May be set later through SetResolution.
 
void TSpectrum3::SetResolution(Double_t resolution)
{
   if (resolution > 1)
      fResolution = resolution;
   else
      fResolution = 1;
}
 
////////////////////////////////////////////////////////////////////////////////
/// This function calculates background spectrum from source spectrum.
/// The result is placed to the array pointed by spectrum pointer.
///
/// Function parameters:
///  - spectrum-pointer to the array of source spectrum
///  - ssizex-x length of spectrum
///  - ssizey-y length of spectrum
///  - ssizez-z length of spectrum
///  - numberIterationsX-maximal x width of clipping window
///  - numberIterationsY-maximal y width of clipping window
///  - numberIterationsZ-maximal z width of clipping window
///    for details we refer to manual
///  - direction- direction of change of clipping window
///    - possible values=kBackIncreasingWindow, kBackDecreasingWindow
///  - filterType-determines the algorithm of the filtering
///    -possible values=kBackSuccessiveFiltering, kBackOneStepFiltering
///
/// ### Background estimation
///
/// Goal: Separation of useful information (peaks) from useless information (background)
///
///  - method is based on Sensitive Nonlinear Iterative Peak (SNIP) clipping
///    algorithm [1]
///  - there exist two algorithms for the estimation of new value in the
///    channel \f$i_1, i_2, i_3\f$
///
/// #### Algorithm based on Successive Comparisons
///
/// It is an extension of one-dimensional SNIP algorithm to another dimension.
/// For details we refer to [2].
///
/// #### Algorithm based on One Step Filtering
///
/// The algorithm is analogous to that for 2-dimensional data. For details we
/// refer to TSpectrum2. New value in the estimated channel is calculated as
/// \f$ a = \nu_{p-1}(i_1, i_2, i_3)\f$
///
/// \image html spectrum3_background_image003.gif
/// \f[
/// \nu_p(i_1, i_2, i_3) = min (a,b)
/// \f]
///
/// where p = 1, 2, ..., number_of_iterations.
///
/// #### References:
///
/// [1] C. G Ryan et al.: SNIP, a
/// statistics-sensitive background treatment for the quantitative analysis of PIXE
/// spectra in geoscience applications. NIM, B34 (1988), 396-402./
///
/// [2] M.Morhac, J. Kliman, V. Matouoek, M. Veselsky, I. Turzo.: Background
/// elimination methods for multidimensional gamma-ray spectra. NIM, A401 (1997)
/// 113-132.
///
/// Example 1- script Back3.c :
///
/// \image html spectrum3_background_image005.jpg Fig. 1 Original three-dimensional gamma-gamma-gamma-ray spectrum
/// \image html spectrum3_background_image006.jpg Fig. 2 Background estimated from data from Fig. 1 using decreasing clipping window with widths 5, 5, 5 and algorithm based on successive comparisons. The estimate includes not only continuously changing background but also one- and two-dimensional ridges.
/// \image html spectrum3_background_image007.jpg Fig. 3 Resulting peaks after subtraction of the estimated background (Fig. 2) from original three-dimensional gamma-gamma-gamma-ray spectrum (Fig. 1).
///
/// #### Script:
///
/// Example to illustrate the background estimator (class TSpectrum3).
/// To execute this example, do:
///
/// `root > .x Back3.C`
///
/// ~~~ {.cpp}
///   void Back3() {
///      Int_t i, j, k;
///      Int_t nbinsx = 64;
///      Int_t nbinsy = 64;
///      Int_t nbinsz = 64;
///      Int_t xmin = 0;
///      Int_t xmax = nbinsx;
///      Int_t ymin = 0;
///      Int_t ymax = nbinsy;
///      Int_t zmin = 0;
///      Int_t zmax = nbinsz;
///      Double_t*** source = new Double_t**[nbinsx];
///      Double_t*** dest = new Double_t**[nbinsx];
///      for(i=0;i<nbinsx;i++){
///         source[i]=new Double_t*[nbinsy];
///         for(j=0;j<nbinsy;j++)
///            source[i][j]=new Double_t[nbinsz];
///      }
///      for(i=0;i<nbinsx;i++){
///         dest[i]=new Double_t*[nbinsy];
///         for(j=0;j<nbinsy;j++)
///            dest[i][j]=new Double_t[nbinsz];
///      }
///      TH3F *back = new TH3F("back","Background estimation",nbinsx,xmin,xmax,nbinsy,ymin,ymax,nbinsz,zmin,zmax);
///      TFile *f = new TFile("TSpectrum3.root");
///      back=(TH3F*)f->Get("back;1");
///      TCanvas *Background = new TCanvas("Background","Estimation of background with decreasing window",10,10,1000,700);
///      TSpectrum3 *s = new TSpectrum3();
///      for (i = 0; i < nbinsx; i++){
///         for (j = 0; j < nbinsy; j++){
///               for (k = 0; k < nbinsz; k++){
///                  source[i][j][k] = back->GetBinContent(i + 1,j + 1,k + 1);
///                  dest[i][j][k] = back->GetBinContent(i + 1,j + 1,k + 1);
///               }
///         }
///      }
///      s->Background(dest,nbinsx,nbinsy,nbinsz,5,5,5,s->kBackDecreasingWindow,s->kBackSuccessiveFiltering);
///      for (i = 0; i < nbinsx; i++){
///         for (j = 0; j < nbinsy; j++){
///            for (k = 0; k < nbinsz; k++){
///               back->SetBinContent(i + 1,j + 1,k + 1, dest[i][j][k]);
///            }
///         }
///      }
///      FILE *out;
///      char PATH[80];
///      strcpy(PATH,"spectra3/back_output_5ds.spe");
///      out=fopen(PATH,"wb");
///      for(i=0;i<nbinsx;i++){
///         for(j=0;j<nbinsy;j++){
///            fwrite(dest[i][j], sizeof(dest[0][0][0]),nbinsz,out);
///         }
///      }
///      fclose(out);
///      for (i = 0; i < nbinsx; i++){
///         for (j = 0; j <nbinsy; j++){
///            for (k = 0; k <nbinsz; k++){
///               source[i][j][k] = source[i][j][k] - dest[i][j][k];
///            }
///         }
///      }
///      for (i = 0; i < nbinsx; i++){
///         for (j = 0; j < nbinsy; j++){
///            for (k = 0; k < nbinsz; k++){
///               back->SetBinContent(i + 1,j + 1,k + 1, source[i][j][k]);
///            }
///         }
///      }
///      strcpy(PATH,"spectra3/back_peaks_5ds.spe");
///      out=fopen(PATH,"wb");
///      for(i=0;i<nbinsx;i++){
///         for(j=0;j<nbinsy;j++){
///            fwrite(source[i][j], sizeof(source[0][0][0]),nbinsz,out);
///         }
///      }
///      fclose(out);
///      back->Draw("");
/// }
/// ~~~
 
const char *TSpectrum3::Background(Double_t***spectrum,
                       Int_t ssizex, Int_t ssizey, Int_t ssizez,
                       Int_t numberIterationsX,
                       Int_t numberIterationsY,
                       Int_t numberIterationsZ,
                       Int_t direction,
                       Int_t filterType)
{
   Int_t i, j, x, y, z, sampling, q1, q2, q3;
   Double_t a, b, c, d, p1, p2, p3, p4, p5, p6, p7, p8, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10, s11, s12, r1, r2, r3, r4, r5, r6;
   if (ssizex <= 0 || ssizey <= 0 || ssizez <= 0)
      return "Wrong parameters";
   if (numberIterationsX < 1 || numberIterationsY < 1 || numberIterationsZ < 1)
      return "Width of Clipping Window Must Be Positive";
   if (ssizex < 2 * numberIterationsX + 1 || ssizey < 2 * numberIterationsY + 1 || ssizey < 2 * numberIterationsZ + 1)
      return ("Too Large Clipping Window");
   Double_t*** working_space=new Double_t**[ssizex];
   for(i=0;i<ssizex;i++){
      working_space[i] =new Double_t*[ssizey];
      for(j=0;j<ssizey;j++)
         working_space[i][j]=new Double_t[ssizez];
   }
   sampling =(Int_t) TMath::Max(numberIterationsX, numberIterationsY);
   sampling =(Int_t) TMath::Max(sampling, numberIterationsZ);
   if (direction == kBackIncreasingWindow) {
      if (filterType == kBackSuccessiveFiltering) {
         for (i = 1; i <= sampling; i++) {
            q1 = (Int_t) TMath::Min(i, numberIterationsX), q2 =(Int_t) TMath::Min(i, numberIterationsY), q3 =(Int_t) TMath::Min(i, numberIterationsZ);
            for (z = q3; z < ssizez - q3; z++) {
               for (y = q2; y < ssizey - q2; y++) {
                  for (x = q1; x < ssizex - q1; x++) {
                     a = spectrum[x][y][z];
                     p1 = spectrum[x + q1][y + q2][z - q3];
                     p2 = spectrum[x - q1][y + q2][z - q3];
                     p3 = spectrum[x + q1][y - q2][z - q3];
                     p4 = spectrum[x - q1][y - q2][z - q3];
                     p5 = spectrum[x + q1][y + q2][z + q3];
                     p6 = spectrum[x - q1][y + q2][z + q3];
                     p7 = spectrum[x + q1][y - q2][z + q3];
                     p8 = spectrum[x - q1][y - q2][z + q3];
                     s1 = spectrum[x + q1][y     ][z - q3];
                     s2 = spectrum[x     ][y + q2][z - q3];
                     s3 = spectrum[x - q1][y     ][z - q3];
                     s4 = spectrum[x     ][y - q2][z - q3];
                     s5 = spectrum[x + q1][y     ][z + q3];
                     s6 = spectrum[x     ][y + q2][z + q3];
                     s7 = spectrum[x - q1][y     ][z + q3];
                     s8 = spectrum[x     ][y - q2][z + q3];
                     s9 = spectrum[x - q1][y + q2][z     ];
                     s10 = spectrum[x - q1][y - q2][z     ];
                     s11 = spectrum[x + q1][y + q2][z     ];
                     s12 = spectrum[x + q1][y - q2][z     ];
                     r1 = spectrum[x     ][y     ][z - q3];
                     r2 = spectrum[x     ][y     ][z + q3];
                     r3 = spectrum[x - q1][y     ][z     ];
                     r4 = spectrum[x + q1][y     ][z     ];
                     r5 = spectrum[x     ][y + q2][z     ];
                     r6 = spectrum[x     ][y - q2][z     ];
                     b = (p1 + p3) / 2.0;
                     if(b > s1)
                        s1 = b;
                     b = (p1 + p2) / 2.0;
                     if(b > s2)
                        s2 = b;
                     b = (p2 + p4) / 2.0;
                     if(b > s3)
                        s3 = b;
                     b = (p3 + p4) / 2.0;
                     if(b > s4)
                        s4 = b;
                     b = (p5 + p7) / 2.0;
                     if(b > s5)
                        s5 = b;
                     b = (p5 + p6) / 2.0;
                     if(b > s6)
                        s6 = b;
                     b = (p6 + p8) / 2.0;
                     if(b > s7)
                        s7 = b;
                     b = (p7 + p8) / 2.0;
                     if(b > s8)
                        s8 = b;
                     b = (p2 + p6) / 2.0;
                     if(b > s9)
                        s9 = b;
                     b = (p4 + p8) / 2.0;
                     if(b > s10)
                        s10 = b;
                     b = (p1 + p5) / 2.0;
                     if(b > s11)
                        s11 = b;
                     b = (p3 + p7) / 2.0;
                     if(b > s12)
                        s12 = b;
                     s1 = s1 - (p1 + p3) / 2.0;
                     s2 = s2 - (p1 + p2) / 2.0;
                     s3 = s3 - (p2 + p4) / 2.0;
                     s4 = s4 - (p3 + p4) / 2.0;
                     s5 = s5 - (p5 + p7) / 2.0;
                     s6 = s6 - (p5 + p6) / 2.0;
                     s7 = s7 - (p6 + p8) / 2.0;
                     s8 = s8 - (p7 + p8) / 2.0;
                     s9 = s9 - (p2 + p6) / 2.0;
                     s10 = s10 - (p4 + p8) / 2.0;
                     s11 = s11 - (p1 + p5) / 2.0;
                     s12 = s12 - (p3 + p7) / 2.0;
                     b = (s1 + s3) / 2.0 + (s2 + s4) / 2.0 + (p1 + p2 + p3 + p4) / 4.0;
                     if(b > r1)
                        r1 = b;
                     b = (s5 + s7) / 2.0 + (s6 + s8) / 2.0 + (p5 + p6 + p7 + p8) / 4.0;
                     if(b > r2)
                        r2 = b;
                     b = (s3 + s7) / 2.0 + (s9 + s10) / 2.0 + (p2 + p4 + p6 + p8) / 4.0;
                     if(b > r3)
                        r3 = b;
                     b = (s1 + s5) / 2.0 + (s11 + s12) / 2.0 + (p1 + p3 + p5 + p7) / 4.0;
                     if(b > r4)
                        r4 = b;
                     b = (s9 + s11) / 2.0 + (s2 + s6) / 2.0 + (p1 + p2 + p5 + p6) / 4.0;
                     if(b > r5)
                        r5 = b;
                     b = (s4 + s8) / 2.0 + (s10 + s12) / 2.0 + (p3 + p4 + p7 + p8) / 4.0;
                     if(b > r6)
                        r6 = b;
                     r1 = r1 - ((s1 + s3) / 2.0 + (s2 + s4) / 2.0 + (p1 + p2 + p3 + p4) / 4.0);
                     r2 = r2 - ((s5 + s7) / 2.0 + (s6 + s8) / 2.0 + (p5 + p6 + p7 + p8) / 4.0);
                     r3 = r3 - ((s3 + s7) / 2.0 + (s9 + s10) / 2.0 + (p2 + p4 + p6 + p8) / 4.0);
                     r4 = r4 - ((s1 + s5) / 2.0 + (s11 + s12) / 2.0 + (p1 + p3 + p5 + p7) / 4.0);
                     r5 = r5 - ((s9 + s11) / 2.0 + (s2 + s6) / 2.0 + (p1 + p2 + p5 + p6) / 4.0);
                     r6 = r6 - ((s4 + s8) / 2.0 + (s10 + s12) / 2.0 + (p3 + p4 + p7 + p8) / 4.0);
                     b = (r1 + r2) / 2.0 + (r3 + r4) / 2.0 + (r5 + r6) / 2.0 + (s1 + s3 + s5 + s7) / 4.0 + (s2 + s4 + s6 + s8) / 4.0 + (s9 + s10 + s11 + s12) / 4.0 + (p1 + p2 + p3 + p4 + p5 + p6 + p7 + p8) / 8.0;
                     if(b < a)
                        a = b;
                     working_space[x][y][z] = a;
                  }
               }
            }
            for (z = q3; z < ssizez - q3; z++) {
               for (y = q2; y < ssizey - q2; y++) {
                  for (x = q1; x < ssizex - q1; x++) {
                     spectrum[x][y][z] = working_space[x][y][z];
                  }
               }
            }
         }
      }
 
      else if (filterType == kBackOneStepFiltering) {
         for (i = 1; i <= sampling; i++) {
            q1 = (Int_t) TMath::Min(i, numberIterationsX), q2 =(Int_t) TMath::Min(i, numberIterationsY), q3 =(Int_t) TMath::Min(i, numberIterationsZ);
            for (z = q3; z < ssizez - q3; z++) {
               for (y = q2; y < ssizey - q2; y++) {
                  for (x = q1; x < ssizex - q1; x++) {
                     a = spectrum[x][y][z];
                     p1 = spectrum[x + q1][y + q2][z - q3];
                     p2 = spectrum[x - q1][y + q2][z - q3];
                     p3 = spectrum[x + q1][y - q2][z - q3];
                     p4 = spectrum[x - q1][y - q2][z - q3];
                     p5 = spectrum[x + q1][y + q2][z + q3];
                     p6 = spectrum[x - q1][y + q2][z + q3];
                     p7 = spectrum[x + q1][y - q2][z + q3];
                     p8 = spectrum[x - q1][y - q2][z + q3];
                     s1 = spectrum[x + q1][y     ][z - q3];
                     s2 = spectrum[x     ][y + q2][z - q3];
                     s3 = spectrum[x - q1][y     ][z - q3];
                     s4 = spectrum[x     ][y - q2][z - q3];
                     s5 = spectrum[x + q1][y     ][z + q3];
                     s6 = spectrum[x     ][y + q2][z + q3];
                     s7 = spectrum[x - q1][y     ][z + q3];
                     s8 = spectrum[x     ][y - q2][z + q3];
                     s9 = spectrum[x - q1][y + q2][z     ];
                     s10 = spectrum[x - q1][y - q2][z     ];
                     s11 = spectrum[x + q1][y + q2][z     ];
                     s12 = spectrum[x + q1][y - q2][z     ];
                     r1 = spectrum[x     ][y     ][z - q3];
                     r2 = spectrum[x     ][y     ][z + q3];
                     r3 = spectrum[x - q1][y     ][z     ];
                     r4 = spectrum[x + q1][y     ][z     ];
                     r5 = spectrum[x     ][y + q2][z     ];
                     r6 = spectrum[x     ][y - q2][z     ];
                     b=(p1 + p2 + p3 + p4 + p5 + p6 + p7 + p8) / 8 - (s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10 + s11 + s12) / 4 + (r1 + r2 + r3 + r4 + r5 + r6) / 2;
                     c = -(s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10 + s11 + s12) / 4 + (r1 + r2 + r3 + r4 + r5 + r6) / 2;
                     d = -(p1 + p2 + p3 + p4 + p5 + p6 + p7 + p8) / 8 + (s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10 + s11 + s12) / 12;
                     if(b < a && b >= 0 && c >=0 && d >= 0)
                        a = b;
                     working_space[x][y][z] = a;
                  }
               }
            }
            for (z = q3; z < ssizez - q3; z++) {
               for (y = q2; y < ssizey - q2; y++) {
                  for (x = q1; x < ssizex - q1; x++) {
                     spectrum[x][y][z] = working_space[x][y][z];
                  }
               }
            }
         }
      }
   }
 
   else if (direction == kBackDecreasingWindow) {
      if (filterType == kBackSuccessiveFiltering) {
         for (i = sampling; i >= 1; i--) {
            q1 = (Int_t) TMath::Min(i, numberIterationsX), q2 =(Int_t) TMath::Min(i, numberIterationsY), q3 =(Int_t) TMath::Min(i, numberIterationsZ);
            for (z = q3; z < ssizez - q3; z++) {
               for (y = q2; y < ssizey - q2; y++) {
                  for (x = q1; x < ssizex - q1; x++) {
                     a = spectrum[x][y][z];
                     p1 = spectrum[x + q1][y + q2][z - q3];
                     p2 = spectrum[x - q1][y + q2][z - q3];
                     p3 = spectrum[x + q1][y - q2][z - q3];
                     p4 = spectrum[x - q1][y - q2][z - q3];
                     p5 = spectrum[x + q1][y + q2][z + q3];
                     p6 = spectrum[x - q1][y + q2][z + q3];
                     p7 = spectrum[x + q1][y - q2][z + q3];
                     p8 = spectrum[x - q1][y - q2][z + q3];
                     s1 = spectrum[x + q1][y     ][z - q3];
                     s2 = spectrum[x     ][y + q2][z - q3];
                     s3 = spectrum[x - q1][y     ][z - q3];
                     s4 = spectrum[x     ][y - q2][z - q3];
                     s5 = spectrum[x + q1][y     ][z + q3];
                     s6 = spectrum[x     ][y + q2][z + q3];
                     s7 = spectrum[x - q1][y     ][z + q3];
                     s8 = spectrum[x     ][y - q2][z + q3];
                     s9 = spectrum[x - q1][y + q2][z     ];
                     s10 = spectrum[x - q1][y - q2][z     ];
                     s11 = spectrum[x + q1][y + q2][z     ];
                     s12 = spectrum[x + q1][y - q2][z     ];
                     r1 = spectrum[x     ][y     ][z - q3];
                     r2 = spectrum[x     ][y     ][z + q3];
                     r3 = spectrum[x - q1][y     ][z     ];
                     r4 = spectrum[x + q1][y     ][z     ];
                     r5 = spectrum[x     ][y + q2][z     ];
                     r6 = spectrum[x     ][y - q2][z     ];
                     b = (p1 + p3) / 2.0;
                     if(b > s1)
                        s1 = b;
                     b = (p1 + p2) / 2.0;
                     if(b > s2)
                        s2 = b;
                     b = (p2 + p4) / 2.0;
                     if(b > s3)
                        s3 = b;
                     b = (p3 + p4) / 2.0;
                     if(b > s4)
                        s4 = b;
                     b = (p5 + p7) / 2.0;
                     if(b > s5)
                        s5 = b;
                     b = (p5 + p6) / 2.0;
                     if(b > s6)
                        s6 = b;
                     b = (p6 + p8) / 2.0;
                     if(b > s7)
                        s7 = b;
                     b = (p7 + p8) / 2.0;
                     if(b > s8)
                        s8 = b;
                     b = (p2 + p6) / 2.0;
                     if(b > s9)
                        s9 = b;
                     b = (p4 + p8) / 2.0;
                     if(b > s10)
                        s10 = b;
                     b = (p1 + p5) / 2.0;
                     if(b > s11)
                        s11 = b;
                     b = (p3 + p7) / 2.0;
                     if(b > s12)
                        s12 = b;
                     s1 = s1 - (p1 + p3) / 2.0;
                     s2 = s2 - (p1 + p2) / 2.0;
                     s3 = s3 - (p2 + p4) / 2.0;
                     s4 = s4 - (p3 + p4) / 2.0;
                     s5 = s5 - (p5 + p7) / 2.0;
                     s6 = s6 - (p5 + p6) / 2.0;
                     s7 = s7 - (p6 + p8) / 2.0;
                     s8 = s8 - (p7 + p8) / 2.0;
                     s9 = s9 - (p2 + p6) / 2.0;
                     s10 = s10 - (p4 + p8) / 2.0;
                     s11 = s11 - (p1 + p5) / 2.0;
                     s12 = s12 - (p3 + p7) / 2.0;
                     b = (s1 + s3) / 2.0 + (s2 + s4) / 2.0 + (p1 + p2 + p3 + p4) / 4.0;
                     if(b > r1)
                        r1 = b;
                     b = (s5 + s7) / 2.0 + (s6 + s8) / 2.0 + (p5 + p6 + p7 + p8) / 4.0;
                     if(b > r2)
                        r2 = b;
                     b = (s3 + s7) / 2.0 + (s9 + s10) / 2.0 + (p2 + p4 + p6 + p8) / 4.0;
                     if(b > r3)
                        r3 = b;
                     b = (s1 + s5) / 2.0 + (s11 + s12) / 2.0 + (p1 + p3 + p5 + p7) / 4.0;
                     if(b > r4)
                        r4 = b;
                     b = (s9 + s11) / 2.0 + (s2 + s6) / 2.0 + (p1 + p2 + p5 + p6) / 4.0;
                     if(b > r5)
                        r5 = b;
                     b = (s4 + s8) / 2.0 + (s10 + s12) / 2.0 + (p3 + p4 + p7 + p8) / 4.0;
                     if(b > r6)
                        r6 = b;
                     r1 = r1 - ((s1 + s3) / 2.0 + (s2 + s4) / 2.0 + (p1 + p2 + p3 + p4) / 4.0);
                     r2 = r2 - ((s5 + s7) / 2.0 + (s6 + s8) / 2.0 + (p5 + p6 + p7 + p8) / 4.0);
                     r3 = r3 - ((s3 + s7) / 2.0 + (s9 + s10) / 2.0 + (p2 + p4 + p6 + p8) / 4.0);
                     r4 = r4 - ((s1 + s5) / 2.0 + (s11 + s12) / 2.0 + (p1 + p3 + p5 + p7) / 4.0);
                     r5 = r5 - ((s9 + s11) / 2.0 + (s2 + s6) / 2.0 + (p1 + p2 + p5 + p6) / 4.0);
                     r6 = r6 - ((s4 + s8) / 2.0 + (s10 + s12) / 2.0 + (p3 + p4 + p7 + p8) / 4.0);
                     b = (r1 + r2) / 2.0 + (r3 + r4) / 2.0 + (r5 + r6) / 2.0 + (s1 + s3 + s5 + s7) / 4.0 + (s2 + s4 + s6 + s8) / 4.0 + (s9 + s10 + s11 + s12) / 4.0 + (p1 + p2 + p3 + p4 + p5 + p6 + p7 + p8) / 8.0;
                     if(b < a)
                        a = b;
                     working_space[x][y][z] = a;
                  }
               }
            }
            for (z = q3; z < ssizez - q3; z++) {
               for (y = q2; y < ssizey - q2; y++) {
                  for (x = q1; x < ssizex - q1; x++) {
                     spectrum[x][y][z] = working_space[x][y][z];
                  }
               }
            }
         }
      }
 
      else if (filterType == kBackOneStepFiltering) {
         for (i = sampling; i >= 1; i--) {
            q1 = (Int_t) TMath::Min(i, numberIterationsX), q2 =(Int_t) TMath::Min(i, numberIterationsY), q3 =(Int_t) TMath::Min(i, numberIterationsZ);
            for (z = q3; z < ssizez - q3; z++) {
               for (y = q2; y < ssizey - q2; y++) {
                  for (x = q1; x < ssizex - q1; x++) {
                     a = spectrum[x][y][z];
                     p1 = spectrum[x + q1][y + q2][z - q3];
                     p2 = spectrum[x - q1][y + q2][z - q3];
                     p3 = spectrum[x + q1][y - q2][z - q3];
                     p4 = spectrum[x - q1][y - q2][z - q3];
                     p5 = spectrum[x + q1][y + q2][z + q3];
                     p6 = spectrum[x - q1][y + q2][z + q3];
                     p7 = spectrum[x + q1][y - q2][z + q3];
                     p8 = spectrum[x - q1][y - q2][z + q3];
                     s1 = spectrum[x + q1][y     ][z - q3];
                     s2 = spectrum[x     ][y + q2][z - q3];
                     s3 = spectrum[x - q1][y     ][z - q3];
                     s4 = spectrum[x     ][y - q2][z - q3];
                     s5 = spectrum[x + q1][y     ][z + q3];
                     s6 = spectrum[x     ][y + q2][z + q3];
                     s7 = spectrum[x - q1][y     ][z + q3];
                     s8 = spectrum[x     ][y - q2][z + q3];
                     s9 = spectrum[x - q1][y + q2][z     ];
                     s10 = spectrum[x - q1][y - q2][z     ];
                     s11 = spectrum[x + q1][y + q2][z     ];
                     s12 = spectrum[x + q1][y - q2][z     ];
                     r1 = spectrum[x     ][y     ][z - q3];
                     r2 = spectrum[x     ][y     ][z + q3];
                     r3 = spectrum[x - q1][y     ][z     ];
                     r4 = spectrum[x + q1][y     ][z     ];
                     r5 = spectrum[x     ][y + q2][z     ];
                     r6 = spectrum[x     ][y - q2][z     ];
                     b = (p1 + p2 + p3 + p4 + p5 + p6 + p7 + p8) / 8 - (s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10 + s11 + s12) / 4 + (r1 + r2 + r3 + r4 + r5 + r6) / 2;
                     c = -(s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10 + s11 + s12) / 4+(r1 + r2 + r3 + r4 + r5 + r6) / 2;
                     d = -(p1 + p2 + p3 + p4 + p5 + p6 + p7 + p8)/8 + (s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10 + s11 + s12) / 12;
                     if(b < a && b >= 0 && c >=0 && d >= 0)
                        a = b;
                     working_space[x][y][z] = a;
                  }
               }
            }
            for (z = q3; z < ssizez - q3; z++) {
               for (y = q2; y < ssizey - q2; y++) {
                  for (x = q1; x < ssizex - q1; x++) {
                     spectrum[x][y][z] = working_space[x][y][z];
                  }
               }
            }
         }
      }
   }
   for(i = 0;i < ssizex; i++){
      for(j = 0;j < ssizey; j++)
         delete[] working_space[i][j];
      delete[] working_space[i];
   }
   delete[] working_space;
   return nullptr;
}
 
////////////////////////////////////////////////////////////////////////////////
/// This function calculates smoothed spectrum from source spectrum
///      based on Markov chain method.
/// The result is placed in the array pointed by spectrum pointer.
///
/// Function parameters:
///  - source-pointer to the array of source spectrum
///  - working_space-pointer to the working array
///  - ssizex-x length of spectrum and working space arrays
///  - ssizey-y length of spectrum and working space arrays
///  - ssizey-z length of spectrum and working space arrays
///  - averWindow-width of averaging smoothing window
///
/// ### Smoothing
///
/// Goal: Suppression of statistical fluctuations
/// the algorithm is based on discrete Markov chain, which has very simple
/// invariant distribution
///
/// \f[
/// U_2 = \frac{p_{1.2}}{p_{2,1}}U_1, U_3 = \frac{p_{2,3}}{p_{3,2}}U_2 U_1, ... , U_n = \frac{p_{n-1,n}}{p_{n,n-1}}U_{n-1} ... U_2 U_1
/// \f]
/// \f$U_1\f$ being defined from the normalization condition \f$ \sum_{i=1}^{n} U_i = 1\f$
/// n is the length of the smoothed spectrum and
/// \f[
/// p_{i,i\pm1} = A_i \sum_{k=1}^{m} exp\left[\frac{y(i\pm k)-y(i)}{y(i\pm k)+y(i)}\right]
/// \f]
///
/// is the probability of the change of the peak position from channel i to the channel i+1.
/// \f$A_i\f$ is the normalization constant so that\f$ p_{i,i-1}+p_{i,i+1}=1\f$ and m is a width
/// of smoothing window. We have extended this algorithm to three dimensions.
///
/// #### Reference:
///
/// [1] Z.K. Silagadze, A new
/// algorithm for automatic photo-peak searches. NIM A 376 (1996), 451-.
///
/// ### Example 1 - script SmootMarkov3.c :
///
/// \image html spectrum3_smoothing_image007.jpg Fig. 1 Original noisy spectrum.
/// \image html spectrum3_smoothing_image008.jpg Fig. 2 Smoothed spectrum with averaging window m=3.
///
/// #### Script:
///
/// Example to illustrate the Markov smoothing (class TSpectrum3).
/// To execute this example, do:
///
/// `root > .x SmoothMarkov3.C`
///
/// ~~~ {.cpp}
///   void SmoothMarkov3() {
///      Int_t i, j, k;
///      Int_t nbinsx = 64;
///      Int_t nbinsy = 64;
///      Int_t nbinsz = 64;
///      Int_t xmin = 0;
///      Int_t xmax = nbinsx;
///      Int_t ymin = 0;
///      Int_t ymax = nbinsy;
///      Int_t zmin = 0;
///      Int_t zmax = nbinsz;
///      Double_t*** source = new Double_t**[nbinsx];
///      for(i=0;i<nbinsx;i++){
///         source[i]=new Double_t*[nbinsy];
///         for(j=0;j<nbinsy;j++)
///            source[i][j]=new Double_t[nbinsz];
///      }
///      TH3F *sm = new TH3F("Smoothing","Markov smoothing",nbinsx,xmin,xmax,nbinsy,ymin,ymax,nbinsz,zmin,zmax);
///      TFile *f = new TFile("TSpectrum3.root");
///      sm=(TH3F*)f->Get("back;1");
///      TCanvas *Background = new TCanvas("Smoothing","Markov smoothing",10,10,1000,700);
///      TSpectrum3 *s = new TSpectrum3();
///      for (i = 0; i < nbinsx; i++){
///         for (j = 0; j < nbinsy; j++){
///               for (k = 0; k < nbinsz; k++){
///                  source[i][j][k] = sm->GetBinContent(i + 1,j + 1,k + 1);
///               }
///         }
///      }
///      s->SmoothMarkov(source,nbinsx,nbinsy,nbinsz,3);
///      for (i = 0; i < nbinsx; i++){
///         for (j = 0; j < nbinsy; j++){
///            for (k = 0; k < nbinsz; k++){
///               sm->SetBinContent(i + 1,j + 1,k + 1, source[i][j][k]);
///            }
///         }
///      }
///      sm->Draw("");
///   }
/// ~~~
 
const char* TSpectrum3::SmoothMarkov(Double_t***source, Int_t ssizex, Int_t ssizey, Int_t ssizez, Int_t averWindow)
{
   Int_t xmin,xmax,ymin,ymax,zmin,zmax,i,j,k,l;
   Double_t a,b,maxch;
   Double_t nom,nip,nim,sp,sm,spx,smx,spy,smy,spz,smz,plocha=0;
   if(averWindow<=0)
      return "Averaging Window must be positive";
   Double_t***working_space = new Double_t**[ssizex];
   for(i = 0;i < ssizex; i++){
      working_space[i] = new Double_t*[ssizey];
      for(j = 0;j < ssizey; j++)
         working_space[i][j] = new Double_t[ssizez];
   }
   xmin = 0;
   xmax = ssizex - 1;
   ymin = 0;
   ymax = ssizey - 1;
   zmin = 0;
   zmax = ssizez - 1;
   for(i = 0,maxch = 0;i < ssizex; i++){
      for(j = 0;j < ssizey; j++){
         for(k = 0;k < ssizez; k++){
            working_space[i][j][k] = 0;
            if(maxch < source[i][j][k])
               maxch = source[i][j][k];
            plocha += source[i][j][k];
         }
      }
   }
   if(maxch == 0) {
      for(i = 0;i < ssizex; i++){
         for(j = 0;j < ssizey; j++)
            delete[] working_space[i][j];
         delete[] working_space[i];
      }
      delete [] working_space;
      return nullptr;
   }
 
   nom = 0;
   working_space[xmin][ymin][zmin] = 1;
   for(i = xmin;i < xmax; i++){
      nip = source[i][ymin][zmin] / maxch;
      nim = source[i + 1][ymin][zmin] / maxch;
      sp = 0,sm = 0;
      for(l = 1;l <= averWindow; l++){
         if((i + l) > xmax)
            a = source[xmax][ymin][zmin] / maxch;
 
         else
            a = source[i + l][ymin][zmin] / maxch;
 
         b = a - nip;
         if(a + nip <= 0)
            a = 1;
 
         else
            a = TMath::Sqrt(a + nip);
 
         b = b / a;
         b = TMath::Exp(b);
         sp = sp + b;
         if(i - l + 1 < xmin)
            a = source[xmin][ymin][zmin] / maxch;
 
         else
            a = source[i - l + 1][ymin][zmin] / maxch;
 
         b = a - nim;
         if(a + nim <= 0)
            a = 1;
 
         else
            a = TMath::Sqrt(a + nim);
 
         b = b / a;
         b = TMath::Exp(b);
         sm = sm + b;
      }
      a = sp / sm;
      a = working_space[i + 1][ymin][zmin] = a * working_space[i][ymin][zmin];
      nom = nom + a;
   }
   for(i = ymin;i < ymax; i++){
      nip = source[xmin][i][zmin] / maxch;
      nim = source[xmin][i + 1][zmin] / maxch;
      sp = 0,sm = 0;
      for(l = 1;l <= averWindow; l++){
         if((i + l) > ymax)
            a = source[xmin][ymax][zmin] / maxch;
 
         else
            a = source[xmin][i + l][zmin] / maxch;
 
         b = a - nip;
         if(a + nip <= 0)
            a = 1;
 
         else
            a = TMath::Sqrt(a + nip);
 
         b = b / a;
         b = TMath::Exp(b);
         sp = sp + b;
         if(i - l + 1 < ymin)
            a = source[xmin][ymin][zmin] / maxch;
 
         else
            a = source[xmin][i - l + 1][zmin] / maxch;
 
         b = a - nim;
         if(a + nim <= 0)
            a = 1;
 
         else
            a = TMath::Sqrt(a + nim);
 
         b = b / a;
         b = TMath::Exp(b);
         sm = sm + b;
      }
      a = sp / sm;
      a = working_space[xmin][i + 1][zmin] = a * working_space[xmin][i][zmin];
      nom = nom + a;
   }
   for(i = zmin;i < zmax; i++){
      nip = source[xmin][ymin][i] / maxch;
      nim = source[xmin][ymin][i + 1] / maxch;
      sp = 0,sm = 0;
      for(l = 1;l <= averWindow; l++){
         if((i + l) > zmax)
            a = source[xmin][ymin][zmax] / maxch;
 
         else
            a = source[xmin][ymin][i + l] / maxch;
 
         b = a - nip;
         if(a + nip <= 0)
            a = 1;
 
         else
            a = TMath::Sqrt(a + nip);
 
         b = b / a;
         b = TMath::Exp(b);
         sp = sp + b;
         if(i - l + 1 < zmin)
            a = source[xmin][ymin][zmin] / maxch;
 
         else
            a = source[xmin][ymin][i - l + 1] / maxch;
 
         b = a - nim;
         if(a + nim <= 0)
            a = 1;
 
         else
            a = TMath::Sqrt(a + nim);
         b = b / a;
         b = TMath::Exp(b);
         sm = sm + b;
      }
      a = sp / sm;
      a = working_space[xmin][ymin][i + 1] = a * working_space[xmin][ymin][i];
      nom = nom + a;
   }
   for(i = xmin;i < xmax; i++){
      for(j = ymin;j < ymax; j++){
         nip = source[i][j + 1][zmin] / maxch;
         nim = source[i + 1][j + 1][zmin] / maxch;
         spx = 0,smx = 0;
         for(l = 1;l <= averWindow; l++){
            if(i + l > xmax)
               a = source[xmax][j][zmin] / maxch;
 
            else
               a = source[i + l][j][zmin] / maxch;
 
            b = a - nip;
            if(a + nip <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nip);
 
            b = b / a;
            b = TMath::Exp(b);
            spx = spx + b;
            if(i - l + 1 < xmin)
               a = source[xmin][j][zmin] / maxch;
 
            else
               a = source[i - l + 1][j][zmin] / maxch;
 
            b = a - nim;
            if(a + nim <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nim);
 
            b = b / a;
            b = TMath::Exp(b);
            smx = smx + b;
         }
         spy = 0,smy = 0;
         nip = source[i + 1][j][zmin] / maxch;
         nim = source[i + 1][j + 1][zmin] / maxch;
         for(l = 1;l <= averWindow; l++){
            if(j + l > ymax)
               a = source[i][ymax][zmin] / maxch;
 
            else
               a = source[i][j + l][zmin] / maxch;
 
            b = a - nip;
            if(a + nip <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nip);
 
            b = b / a;
            b = TMath::Exp(b);
            spy = spy + b;
            if(j - l + 1 < ymin)
               a = source[i][ymin][zmin] / maxch;
 
            else
               a = source[i][j - l + 1][zmin] / maxch;
 
            b = a - nim;
            if(a + nim <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nim);
 
            b = b / a;
            b = TMath::Exp(b);
            smy = smy + b;
         }
         a = (spx * working_space[i][j + 1][zmin] + spy * working_space[i + 1][j][zmin]) / (smx + smy);
         working_space[i + 1][j + 1][zmin] = a;
         nom = nom + a;
      }
   }
   for(i = xmin;i < xmax; i++){
      for(j = zmin;j < zmax; j++){
         nip = source[i][ymin][j + 1] / maxch;
         nim = source[i + 1][ymin][j + 1] / maxch;
         spx = 0,smx = 0;
         for(l = 1;l <= averWindow; l++){
            if(i + l > xmax)
               a = source[xmax][ymin][j] / maxch;
 
            else
               a = source[i + l][ymin][j] / maxch;
 
            b = a - nip;
            if(a + nip <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nip);
 
            b = b / a;
            b = TMath::Exp(b);
            spx = spx + b;
            if(i - l + 1 < xmin)
               a = source[xmin][ymin][j] / maxch;
 
            else
               a = source[i - l + 1][ymin][j] / maxch;
 
            b = a - nim;
            if(a + nim <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nim);
 
            b = b / a;
            b = TMath::Exp(b);
            smx = smx + b;
         }
         spz = 0,smz = 0;
         nip = source[i + 1][ymin][j] / maxch;
         nim = source[i + 1][ymin][j + 1] / maxch;
         for(l = 1;l <= averWindow; l++){
            if(j + l > zmax)
               a = source[i][ymin][zmax] / maxch;
 
            else
               a = source[i][ymin][j + l] / maxch;
 
            b = a - nip;
            if(a + nip <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nip);
 
            b = b / a;
            b = TMath::Exp(b);
            spz = spz + b;
            if(j - l + 1 < zmin)
               a = source[i][ymin][zmin] / maxch;
 
            else
               a = source[i][ymin][j - l + 1] / maxch;
 
            b = a - nim;
            if(a + nim <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nim);
 
            b = b / a;
            b = TMath::Exp(b);
            smz = smz + b;
         }
         a = (spx * working_space[i][ymin][j + 1] + spz * working_space[i + 1][ymin][j]) / (smx + smz);
         working_space[i + 1][ymin][j + 1] = a;
         nom = nom + a;
      }
   }
   for(i = ymin;i < ymax; i++){
      for(j = zmin;j < zmax; j++){
         nip = source[xmin][i][j + 1] / maxch;
         nim = source[xmin][i + 1][j + 1] / maxch;
         spy = 0,smy = 0;
         for(l = 1;l <= averWindow; l++){
            if(i + l > ymax)
               a = source[xmin][ymax][j] / maxch;
 
            else
               a = source[xmin][i + l][j] / maxch;
 
            b = a - nip;
            if(a + nip <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nip);
 
            b = b / a;
            b = TMath::Exp(b);
            spy = spy + b;
            if(i - l + 1 < ymin)
               a = source[xmin][ymin][j] / maxch;
 
            else
               a = source[xmin][i - l + 1][j] / maxch;
 
            b = a - nim;
            if(a + nim <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nim);
 
            b = b / a;
            b = TMath::Exp(b);
            smy = smy + b;
         }
         spz = 0,smz = 0;
         nip = source[xmin][i + 1][j] / maxch;
         nim = source[xmin][i + 1][j + 1] / maxch;
         for(l = 1;l <= averWindow; l++){
            if(j + l > zmax)
               a = source[xmin][i][zmax] / maxch;
 
            else
               a = source[xmin][i][j + l] / maxch;
 
            b = a - nip;
            if(a + nip <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nip);
 
            b = b / a;
            b = TMath::Exp(b);
            spz = spz + b;
            if(j - l + 1 < zmin)
               a = source[xmin][i][zmin] / maxch;
 
            else
               a = source[xmin][i][j - l + 1] / maxch;
 
            b = a - nim;
            if(a + nim <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nim);
 
            b = b / a;
            b = TMath::Exp(b);
            smz = smz + b;
         }
         a = (spy * working_space[xmin][i][j + 1] + spz * working_space[xmin][i + 1][j]) / (smy + smz);
         working_space[xmin][i + 1][j + 1] = a;
         nom = nom + a;
      }
   }
   for(i = xmin;i < xmax; i++){
      for(j = ymin;j < ymax; j++){
         for(k = zmin;k < zmax; k++){
            nip = source[i][j + 1][k + 1] / maxch;
            nim = source[i + 1][j + 1][k + 1] / maxch;
            spx = 0,smx = 0;
            for(l = 1;l <= averWindow; l++){
               if(i + l > xmax)
                  a = source[xmax][j][k] / maxch;
 
               else
                  a = source[i + l][j][k] / maxch;
 
               b = a - nip;
               if(a + nip <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nip);
 
               b = b / a;
               b = TMath::Exp(b);
               spx = spx + b;
               if(i - l + 1 < xmin)
                  a = source[xmin][j][k] / maxch;
 
               else
                  a = source[i - l + 1][j][k] / maxch;
 
               b = a - nim;
               if(a + nim <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nim);
 
               b = b / a;
               b = TMath::Exp(b);
               smx = smx + b;
            }
            spy = 0,smy = 0;
            nip = source[i + 1][j][k + 1] / maxch;
            nim = source[i + 1][j + 1][k + 1] / maxch;
            for(l = 1;l <= averWindow; l++){
               if(j + l > ymax)
                  a = source[i][ymax][k] / maxch;
 
               else
                  a = source[i][j + l][k] / maxch;
 
               b = a - nip;
               if(a + nip <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nip);
 
               b = b / a;
               b = TMath::Exp(b);
               spy = spy + b;
               if(j - l + 1 < ymin)
                  a = source[i][ymin][k] / maxch;
 
               else
                  a = source[i][j - l + 1][k] / maxch;
 
               b = a - nim;
               if(a + nim <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nim);
 
               b = b / a;
               b = TMath::Exp(b);
               smy = smy + b;
            }
            spz = 0,smz = 0;
            nip = source[i + 1][j + 1][k] / maxch;
            nim = source[i + 1][j + 1][k + 1] / maxch;
            for(l = 1;l <= averWindow; l++){
               if(j + l > zmax)
                  a = source[i][j][zmax] / maxch;
 
               else
                  a = source[i][j][k + l] / maxch;
 
               b = a - nip;
               if(a + nip <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nip);
 
               b = b / a;
               b = TMath::Exp(b);
               spz = spz + b;
               if(j - l + 1 < ymin)
                  a = source[i][j][zmin] / maxch;
 
               else
                  a = source[i][j][k - l + 1] / maxch;
 
               b = a - nim;
               if(a + nim <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nim);
 
               b = b / a;
               b = TMath::Exp(b);
               smz = smz+b;
            }
            a = (spx * working_space[i][j + 1][k + 1] + spy * working_space[i + 1][j][k + 1] + spz * working_space[i + 1][j + 1][k]) / (smx + smy + smz);
            working_space[i + 1][j + 1][k + 1] = a;
            nom = nom + a;
         }
      }
   }
   for(i = xmin;i <= xmax; i++){
      for(j = ymin;j <= ymax; j++){
         for(k = zmin;k <= zmax; k++){
            working_space[i][j][k] = working_space[i][j][k] / nom;
         }
      }
   }
   for(i = 0;i < ssizex; i++){
      for(j = 0;j < ssizey; j++){
         for(k = 0;k < ssizez; k++){
            source[i][j][k] = plocha * working_space[i][j][k];
         }
      }
   }
   for(i = 0;i < ssizex; i++){
      for(j = 0;j < ssizey; j++)
         delete[] working_space[i][j];
      delete[] working_space[i];
   }
   delete[] working_space;
   return nullptr;
}
 
////////////////////////////////////////////////////////////////////////////////
/// This function calculates deconvolution from source spectrum
/// according to response spectrum
/// The result is placed in the cube pointed by source pointer.
///
/// Function parameters:
///  - source-pointer to the cube of source spectrum
///  - resp-pointer to the cube of response spectrum
///  - ssizex-x length of source and response spectra
///  - ssizey-y length of source and response spectra
///  - ssizey-y length of source and response spectra
///  - numberIterations, for details we refer to manual
///  - numberRepetitions, for details we refer to manual
///  - boost, boosting factor, for details we refer to manual
///
/// ### Deconvolution
///
/// Goal: Improvement of the resolution in spectra, decomposition of multiplets
///
/// Mathematical formulation of the 3-dimensional convolution system is
///
/// \image html spectrum3_deconvolution_image001.gif
///
/// where h(i,j,k) is the impulse response function, x, y are
/// input and output fields, respectively, \f$ N_1, N_2, N3\f$, are the lengths of x and h fields
///
///  - let us assume that we know the response and the output fields (spectra)
///    of the above given system.
///
///  - the deconvolution represents solution of the overdetermined system of
///    linear equations, i.e., the calculation of the field -x.
///
///  -  from numerical stability point of view the operation of deconvolution is
///     extremely critical (ill-posed problem) as well as time consuming operation.
///
///  - the Gold deconvolution algorithm proves to work very well even for
///     2-dimensional systems. Generalization of the algorithm for 2-dimensional
///     systems was presented in [1], and for multidimensional systems in [2].
///
///  - for Gold deconvolution algorithm as well as for boosted deconvolution
///     algorithm we refer also to TSpectrum and TSpectrum2
///
/// #### References:
///
/// [1] M.Morhac, J. Kliman, V. Matouoek, M. Veselsky, I. Turzo.: Efficient
/// one- and two-dimensional Gold deconvolution and its application to gamma-ray
/// spectra decomposition. NIM, A401 (1997) 385-408.
///
/// [2] Morhac M., Matouoek V.,
/// Kliman J., Efficient algorithm of multidimensional deconvolution and its
/// application to nuclear data processing, Digital Signal Processing 13 (2003) 144.
///
/// ### Example 1 - script Decon.c :
///
/// response function (usually peak) should be shifted to the beginning of
/// the coordinate system (see Fig. 1)
///
/// \image html spectrum3_deconvolution_image003.jpg Fig. 1 Three-dimensional response spectrum
/// \image html spectrum3_deconvolution_image004.jpg Fig. 2 Three-dimensional input spectrum (before deconvolution)
/// \image html spectrum3_deconvolution_image005.jpg Fig. 3 Spectrum from Fig. 2 after deconvolution (100 iterations)
///
/// #### Script:
///
/// Example to illustrate the Gold deconvolution (class TSpectrum3).
/// To execute this example, do:
///
/// `root > .x Decon3.C`
///
/// ~~~ {.cpp}
///   #include <TSpectrum3>
///   void Decon3() {
///      Int_t i, j, k;
///      Int_t nbinsx = 32;
///      Int_t nbinsy = 32;
///      Int_t nbinsz = 32;
///      Int_t xmin = 0;
///      Int_t xmax = nbinsx;
///      Int_t ymin = 0;
///      Int_t ymax = nbinsy;
///      Int_t zmin = 0;
///      Int_t zmax = nbinsz;
///      Double_t*** source = newDouble_t**[nbinsx];
///      Double_t*** resp = new Double_t**[nbinsx];
///      for(i=0;i<nbinsx;i++){
///         source[i]=new Double_t* [nbinsy];
///         for(j=0;j<nbinsy;j++)
///            source[i][j]=new Double_t[nbinsz];
///      }
///      for(i=0;i<nbinsx;i++){
///         resp[i]=new Double_t*[nbinsy];
///         for(j=0;j<nbinsy;j++)
///            resp[i][j]=new Double_t[nbinsz];
///      }
///      TH3F *decon_in = new TH3F("decon_in","Deconvolution",nbinsx,xmin,xmax,nbinsy,ymin,ymax,nbinsz,zmin,zmax);
///      TH3F *decon_resp = new TH3F("decon_resp","Deconvolution",nbinsx,xmin,xmax,nbinsy,ymin,ymax,nbinsz,zmin,zmax);
///      TFile *f = new TFile("TSpectrum3.root");
///      decon_in=(TH3F*) f->Get("decon_in;1");
///      decon_resp=(TH3F*) f->Get("decon_resp;1");
///      TCanvas *Deconvolution = new TCanvas("Deconvolution","Deconvolution of 3-dimensional spectra",10,10,1000,700);
///      TSpectrum3 *s = new TSpectrum3();
///      for (i = 0; i < nbinsx; i++){
///         for (j = 0; j < nbinsy; j++){
///               for (k = 0; k < nbinsz; k++){
///                  source[i][j][k] = decon_in->GetBinContent(i + 1,j + 1,k + 1);
///                  resp[i][j][k] = decon_resp->GetBinContent(i + 1,j + 1,k + 1);
///               }
///         }
///      }
///      s->Deconvolution(source,resp,nbinsx,nbinsy,nbinsz,100,1,1);
///      for (i = 0; i < nbinsx; i++){
///         for (j = 0; j < nbinsy; j++){
///            for (k = 0; k < nbinsz; k++){
///               decon_in->SetBinContent(i + 1,j + 1,k + 1, source[i][j][k]);
///            }
///         }
///      }
///      decon_in->Draw("");
///   }
/// ~~~
///
/// ### Example 2 - script Decon_hr.c :
///
/// This example illustrates repeated
/// Gold deconvolution with boosting. After every 10 iterations we apply power
/// function with exponent = 2 to the spectrum given in Fig. 2.
///
/// \image html spectrum3_deconvolution_image006.jpg Fig. 4 Spectrum from Fig. 2 after boosted deconvolution (10 iterations repeated 10 times). It decomposes completely cluster of peaks from Fig 2.
///
/// #### Script:
///
/// Example to illustrate the Gold deconvolution (class TSpectrum3).
/// To execute this example, do:
///
/// `root > .x Decon3_hr.C`
///
/// ~~~ {.cpp}
///   void Decon3_hr() {
///      Int_t i, j, k;
///      Int_t nbinsx = 32;
///      Int_t nbinsy = 32;
///      Int_t nbinsz = 32;
///      Int_t xmin = 0;
///      Int_t xmax = nbinsx;
///      Int_t ymin = 0;
///      Int_t ymax = nbinsy;
///      Int_t zmin = 0;
///      Int_t zmax = nbinsz;
///      Double_t*** source = new Double_t**[nbinsx];
///      Double_t*** resp = new Double_t**[nbinsx];
///      for(i=0;i<nbinsx;i++){
///         source[i]=new Double_t*[nbinsy];
///         for(j=0;j<nbinsy;j++)
///            source[i][j]=new Double_t[nbinsz];
///      }
///      for(i=0;i<nbinsx;i++){
///         resp[i]=new Double_t*[nbinsy];
///         for(j=0;j<nbinsy;j++)
///            resp[i][j]=new Double_t[nbinsz];
///      }
///      TH3F *decon_in = new TH3F("decon_in","Deconvolution",nbinsx,xmin,xmax,nbinsy,ymin,ymax,nbinsz,zmin,zmax);
///      TH3F *decon_resp = new TH3F("decon_resp","Deconvolution",nbinsx,xmin,xmax,nbinsy,ymin,ymax,nbinsz,zmin,zmax);
///      TFile *f = new TFile("TSpectrum3.root");
///      decon_in=(TH3F*)f->Get("decon_in;1");
///      decon_resp=(TH3F*)f->Get("decon_resp;1");
///      TCanvas *Deconvolution = new TCanvas("Deconvolution","High resolution deconvolution of 3-dimensional spectra",10,10,1000,700);
///      TSpectrum3 *s = new TSpectrum3();
///      for (i = 0; i < nbinsx; i++){
///         for (j = 0; j < nbinsy; j++){
///            for (k = 0; k < nbinsz; k++){
///               source[i][j][k] = decon_in->GetBinContent(i + 1,j + 1,k + 1);
///               resp[i][j][k] = decon_resp->GetBinContent(i + 1,j + 1,k + 1);
///            }
///         }
///      }
///      s->Deconvolution(source,resp,nbinsx,nbinsy,nbinsz,10,10,2);
///      for (i = 0; i < nbinsx; i++){
///         for (j = 0; j < nbinsy; j++){
///            for (k = 0; k < nbinsz; k++){
///               decon_in->SetBinContent(i + 1,j + 1,k + 1, source[i][j][k]);
///            }
///         }
///      }
///      decon_in->Draw("");
///   }
/// ~~~
 
const char *TSpectrum3::Deconvolution(Double_t***source, const Double_t***resp,
                                       Int_t ssizex, Int_t ssizey, Int_t ssizez,
                                       Int_t numberIterations,
                                       Int_t numberRepetitions,
                                       Double_t boost)
{
   Int_t i, j, k, lhx, lhy, lhz, i1, i2, i3, j1, j2, j3, k1, k2, k3, lindex, i1min, i1max, i2min, i2max, i3min, i3max, j1min, j1max, j2min, j2max, j3min, j3max, positx = 0, posity = 0, positz = 0, repet;
   Double_t lda, ldb, ldc, area, maximum = 0;
   if (ssizex <= 0 || ssizey <= 0 || ssizez <= 0)
      return "Wrong parameters";
   if (numberIterations <= 0)
      return "Number of iterations must be positive";
   if (numberRepetitions <= 0)
      return "Number of repetitions must be positive";
   Double_t ***working_space=new Double_t** [ssizex];
   for(i=0;i<ssizex;i++){
      working_space[i]=new Double_t* [ssizey];
      for(j=0;j<ssizey;j++)
         working_space[i][j]=new Double_t [5*ssizez];
   }
   area = 0;
   lhx = -1, lhy = -1, lhz = -1;
   for (i = 0; i < ssizex; i++) {
      for (j = 0; j < ssizey; j++) {
         for (k = 0; k < ssizez; k++) {
            lda = resp[i][j][k];
            if (lda != 0) {
               if ((i + 1) > lhx)
                  lhx = i + 1;
               if ((j + 1) > lhy)
                  lhy = j + 1;
               if ((k + 1) > lhz)
                  lhz = k + 1;
            }
            working_space[i][j][k] = lda;
            area = area + lda;
            if (lda > maximum) {
               maximum = lda;
               positx = i, posity = j, positz = k;
            }
         }
      }
   }
   if (lhx == -1 || lhy == -1 || lhz == -1) {
      for(i = 0;i < ssizex; i++){
         for(j = 0;j < ssizey; j++)
            delete[] working_space[i][j];
         delete[] working_space[i];
      }
      delete [] working_space;
      return ("Zero response data");
   }
 
//calculate ht*y and write into p
   for (i3 = 0; i3 < ssizez; i3++) {
      for (i2 = 0; i2 < ssizey; i2++) {
         for (i1 = 0; i1 < ssizex; i1++) {
            ldc = 0;
            for (j3 = 0; j3 <= (lhz - 1); j3++) {
               for (j2 = 0; j2 <= (lhy - 1); j2++) {
                  for (j1 = 0; j1 <= (lhx - 1); j1++) {
                     k3 = i3 + j3, k2 = i2 + j2, k1 = i1 + j1;
                     if (k3 >= 0 && k3 < ssizez && k2 >= 0 && k2 < ssizey && k1 >= 0 && k1 < ssizex) {
                        lda = working_space[j1][j2][j3];
                        ldb = source[k1][k2][k3];
                        ldc = ldc + lda * ldb;
                     }
                  }
               }
            }
            working_space[i1][i2][i3 + ssizez] = ldc;
         }
      }
   }
 
//calculate matrix b=ht*h
   i1min = -(lhx - 1), i1max = lhx - 1;
   i2min = -(lhy - 1), i2max = lhy - 1;
   i3min = -(lhz - 1), i3max = lhz - 1;
   for (i3 = i3min; i3 <= i3max; i3++) {
      for (i2 = i2min; i2 <= i2max; i2++) {
         for (i1 = i1min; i1 <= i1max; i1++) {
            ldc = 0;
            j3min = -i3;
            if (j3min < 0)
               j3min = 0;
            j3max = lhz - 1 - i3;
            if (j3max > lhz - 1)
               j3max = lhz - 1;
            for (j3 = j3min; j3 <= j3max; j3++) {
               j2min = -i2;
               if (j2min < 0)
                  j2min = 0;
               j2max = lhy - 1 - i2;
               if (j2max > lhy - 1)
                  j2max = lhy - 1;
               for (j2 = j2min; j2 <= j2max; j2++) {
                  j1min = -i1;
                  if (j1min < 0)
                     j1min = 0;
                  j1max = lhx - 1 - i1;
                  if (j1max > lhx - 1)
                     j1max = lhx - 1;
                  for (j1 = j1min; j1 <= j1max; j1++) {
                     lda = working_space[j1][j2][j3];
                     if (i1 + j1 < ssizex && i2 + j2 < ssizey)
                        ldb = working_space[i1 + j1][i2 + j2][i3 + j3];
                     else
                        ldb = 0;
                     ldc = ldc + lda * ldb;
                  }
               }
            }
            working_space[i1 - i1min][i2 - i2min][i3 - i3min + 2 * ssizez ] = ldc;
         }
      }
   }
 
//initialization in x1 matrix
   for (i3 = 0; i3 < ssizez; i3++) {
      for (i2 = 0; i2 < ssizey; i2++) {
         for (i1 = 0; i1 < ssizex; i1++) {
            working_space[i1][i2][i3 + 3 * ssizez] = 1;
            working_space[i1][i2][i3 + 4 * ssizez] = 0;
         }
      }
   }
 
 //START OF ITERATIONS
   for (repet = 0; repet < numberRepetitions; repet++) {
      if (repet != 0) {
         for (i = 0; i < ssizex; i++) {
            for (j = 0; j < ssizey; j++) {
               for (k = 0; k < ssizez; k++) {
                  working_space[i][j][k + 3 * ssizez] = TMath::Power(working_space[i][j][k + 3 * ssizez],boost);
               }
            }
         }
      }
      for (lindex = 0; lindex < numberIterations; lindex++) {
         for (i3 = 0; i3 < ssizez; i3++) {
            for (i2 = 0; i2 < ssizey; i2++) {
               for (i1 = 0; i1 < ssizex; i1++) {
                  ldb = 0;
                  j3min = i3;
                  if (j3min > lhz - 1)
                     j3min = lhz - 1;
                  j3min = -j3min;
                  j3max = ssizez - i3 - 1;
                  if (j3max > lhz - 1)
                     j3max = lhz - 1;
                  j2min = i2;
                  if (j2min > lhy - 1)
                     j2min = lhy - 1;
                  j2min = -j2min;
                  j2max = ssizey - i2 - 1;
                  if (j2max > lhy - 1)
                     j2max = lhy - 1;
                  j1min = i1;
                  if (j1min > lhx - 1)
                     j1min = lhx - 1;
                  j1min = -j1min;
                  j1max = ssizex - i1 - 1;
                  if (j1max > lhx - 1)
                     j1max = lhx - 1;
                  for (j3 = j3min; j3 <= j3max; j3++) {
                     for (j2 = j2min; j2 <= j2max; j2++) {
                        for (j1 = j1min; j1 <= j1max; j1++) {
                           ldc =  working_space[j1 - i1min][j2 - i2min][j3 - i3min + 2 * ssizez];
                           lda = working_space[i1 + j1][i2 + j2][i3 + j3 + 3 * ssizez];
                           ldb = ldb + lda * ldc;
                        }
                     }
                  }
                  lda = working_space[i1][i2][i3 + 3 * ssizez];
                  ldc = working_space[i1][i2][i3 + 1 * ssizez];
                  if (ldc * lda != 0 && ldb != 0) {
                     lda = lda * ldc / ldb;
                  }
 
                  else
                     lda = 0;
                  working_space[i1][i2][i3 + 4 * ssizez] = lda;
               }
            }
         }
         for (i3 = 0; i3 < ssizez; i3++) {
            for (i2 = 0; i2 < ssizey; i2++) {
               for (i1 = 0; i1 < ssizex; i1++)
                  working_space[i1][i2][i3 + 3 * ssizez] = working_space[i1][i2][i3 + 4 * ssizez];
            }
         }
      }
   }
   for (i = 0; i < ssizex; i++) {
      for (j = 0; j < ssizey; j++){
         for (k = 0; k < ssizez; k++)
            source[(i + positx) % ssizex][(j + posity) % ssizey][(k + positz) % ssizez] = area * working_space[i][j][k + 3 * ssizez];
      }
   }
   for(i = 0;i < ssizex; i++){
      for(j = 0;j < ssizey; j++)
         delete[] working_space[i][j];
      delete[] working_space[i];
   }
   delete [] working_space;
   return nullptr;
}
 
////////////////////////////////////////////////////////////////////////////////
/// This function searches for peaks in source spectrum
/// It is based on deconvolution method. First the background is
/// removed (if desired), then Markov spectrum is calculated
/// (if desired), then the response function is generated
/// according to given sigma and deconvolution is carried out.
/// It returns number of found peaks.
///
/// Function parameters:
///  - source-pointer to the matrix of source spectrum
///  - dest-pointer to the matrix of resulting deconvolved spectrum
///  - ssizex-x length of source spectrum
///  - ssizey-y length of source spectrum
///  - ssizez-z length of source spectrum
///  - sigma-sigma of searched peaks, for details we refer to manual
///  - threshold-threshold value in % for selected peaks, peaks with
///    amplitude less than threshold*highest_peak/100
///    are ignored, see manual
///  - backgroundRemove-logical variable, set if the removal of
///    background before deconvolution is desired
///  - deconIterations-number of iterations in deconvolution operation
///  - markov-logical variable, if it is true, first the source spectrum
///    is replaced by new spectrum calculated using Markov
///    chains method.
///  - averWindow-averaging window of searched peaks, for details
///    we refer to manual (applies only for Markov method)
///
/// ### Peaks searching
///
/// Goal: to identify automatically the peaks in spectrum with the presence of
/// the continuous background, one- and two-fold coincidences (ridges) and statistical
/// fluctuations - noise.
///
/// The common problems connected
/// with correct peak identification in three-dimensional coincidence spectra are
///
///   - non-sensitivity to noise, i.e.,
///     only statistically relevant peaks should be identified
///   - non-sensitivity of the
///     algorithm to continuous background
///   - non-sensitivity to one-fold coincidences
///     (coincidences peak - peak - background in all dimensions) and their
///     crossings
///   - non-sensitivity to two-fold
///     coincidences (coincidences peak - background - background in all
///     dimensions) and their crossings
///   - ability to identify peaks close
///     to the edges of the spectrum region
///   - resolution, decomposition of
///     doublets and multiplets. The algorithm should be able to recognise close
///     positioned peaks.
///
/// #### References:
///
/// [1] M.A. Mariscotti: A method for
/// identification of peaks in the presence of background and its application to
/// spectrum analysis. NIM 50 (1967), 309-320.
///
/// [2] M.Morhac, J. Kliman, V. Matouoek, M. Veselsky, I. Turzo.:Identification
/// of peaks in multidimensional coincidence gamma-ray spectra. NIM, A443 (2000)
/// 108-125.
///
/// [3] Z.K. Silagadze, A new algorithm for automatic photo-peak searches. NIM A 376 (1996), 451.
///
/// ### Example of peak searching method
///
/// SearchHighRes function provides users with the possibility
/// to vary the input parameters and with the access to the output deconvolved data
/// in the destination spectrum. Based on the output data one can tune the
/// parameters.
///
/// #### Example 1 - script Search3.c:
///
/// \image html spectrum3_searching_image001.jpg Fig. 1 Three-dimensional spectrum with 5 peaks (sigma=2, threshold=5%, 3 iterations steps in the deconvolution)
/// \image html spectrum3_searching_image003.jpg Fig. 2 Spectrum from Fig. 1 after background elimination and deconvolution
///
/// #### Script:
///
/// Example to illustrate high resolution peak searching function (class TSpectrum3).
/// To execute this example, do:
///
/// `root > .x Search3.C`
///
/// ~~~ {.cpp}
///   void Search3() {
///      Int_t i, j, k, nfound;
///      Int_t nbinsx = 32;
///      Int_t nbinsy = 32;
///      Int_t nbinsz = 32;
///      Int_t xmin = 0;
///      Int_t xmax = nbinsx;
///      Int_t ymin = 0;
///      Int_t ymax = nbinsy;
///      Int_t zmin = 0;
///      Int_t zmax = nbinsz;
///      Double_t*** source = new Double_t**[nbinsx];
///      Double_t*** dest = new Double_t**[nbinsx];
///      for(i=0;i<nbinsx;i++){
///         source[i]=new Double_t*[nbinsy];
///         for(j=0;j<nbinsy;j++)
///            source[i][j]=new Double_t[nbinsz];
///       }
///      for(i=0;i<nbinsx;i++){
///         dest[i]=new Double_t*[nbinsy];
///         for(j=0;j<nbinsy;j++)
///            dest[i][j]=new Double_t [nbinsz];
///      }
///      TH3F *search = new TH3F("Search","Peak searching",nbinsx,xmin,xmax,nbinsy,ymin,ymax,nbinsz,zmin,zmax);
///      TFile *f = new TFile("TSpectrum3.root");
///      search=(TH3F*)f->Get("search2;1");
///      TCanvas *Search = new TCanvas("Search","Peak searching",10,10,1000,700);
///      TSpectrum3 *s = new TSpectrum3();
///      for (i = 0; i < nbinsx; i++){
///         for (j = 0; j < nbinsy; j++){
///            for (k = 0; k < nbinsz; k++){
///               source[i][j][k] = search->GetBinContent(i + 1,j + 1,k + 1);
///            }
///         }
///      }
///      nfound = s->SearchHighRes(source, dest, nbinsx, nbinsy, nbinsz, 2, 5, kTRUE, 3, kFALSE, 3);
///      printf("Found %d candidate peaks\n",nfound);
///      for (i = 0; i < nbinsx; i++){
///         for (j = 0; j < nbinsy; j++){
///            for (k = 0; k < nbinsz; k++){
///               search->SetBinContent(i + 1,j + 1,k + 1, dest[i][j][k]);
///            }
///         }
///      }
///      Double_t *PosX = new Double_t[nfound];
///      Double_t *PosY = new Double_t[nfound];
///      Double_t *PosZ = new Double_t[nfound];
///      PosX = s->GetPositionX();
///      PosY = s->GetPositionY();
///      PosZ = s->GetPositionZ();
///      for(i=0;i<nfound;i++)
///            printf("posx= %d, posy= %d, posz=%d\n",(Int_t)(PosX[i]+0.5), (Int_t)(PosY[i]+0.5),(Int_t)(PosZ[i]+0.5));
///      search->Draw("");
///   }
/// ~~~
 
Int_t TSpectrum3::SearchHighRes(const Double_t***source,Double_t***dest, Int_t ssizex, Int_t ssizey, Int_t ssizez,
                                 Double_t sigma, Double_t threshold,
                                 Bool_t backgroundRemove,Int_t deconIterations,
                                 Bool_t markov, Int_t averWindow)
 
{
   Int_t number_of_iterations = (Int_t)(4 * sigma + 0.5);
   Int_t k,lindex;
   Double_t lda,ldb,ldc,area,maximum;
   Int_t xmin,xmax,l,peak_index = 0,sizex_ext=ssizex + 4 * number_of_iterations,sizey_ext = ssizey + 4 * number_of_iterations,sizez_ext = ssizez + 4 * number_of_iterations,shift = 2 * number_of_iterations;
   Int_t ymin,ymax,zmin,zmax,i,j;
   Double_t a,b,maxch,plocha_markov = 0;
   Double_t nom,nip,nim,sp,sm,spx,spy,smx,smy,spz,smz;
   Double_t p1,p2,p3,p4,p5,p6,p7,p8,s1,s2,s3,s4,s5,s6,s7,s8,s9,s10,s11,s12,r1,r2,r3,r4,r5,r6;
   Int_t x,y,z;
   Double_t pocet_sigma = 5;
   Int_t lhx,lhy,lhz,i1,i2,i3,j1,j2,j3,k1,k2,k3,i1min,i1max,i2min,i2max,i3min,i3max,j1min,j1max,j2min,j2max,j3min,j3max,positx,posity,positz;
   if(sigma < 1){
      Error("SearchHighRes", "Invalid sigma, must be greater than or equal to 1");
      return 0;
   }
 
   if(threshold<=0||threshold>=100){
      Error("SearchHighRes", "Invalid threshold, must be positive and less than 100");
      return 0;
   }
 
   j = (Int_t)(pocet_sigma*sigma+0.5);
   if (j >= PEAK_WINDOW / 2) {
      Error("SearchHighRes", "Too large sigma");
      return 0;
   }
 
   if (markov == true) {
      if (averWindow <= 0) {
         Error("SearchHighRes", "Averaging window must be positive");
         return 0;
      }
   }
 
   if(backgroundRemove == true){
      if(sizex_ext < 2 * number_of_iterations + 1 || sizey_ext < 2 * number_of_iterations + 1 || sizez_ext < 2 * number_of_iterations + 1){
         Error("SearchHighRes", "Too large clipping window");
         return 0;
      }
   }
 
   i = (Int_t)(4 * sigma + 0.5);
   i = 4 * i;
   Double_t ***working_space = new Double_t** [ssizex + i];
   for(j = 0;j < ssizex + i; j++){
      working_space[j] = new Double_t* [ssizey + i];
      for(k = 0;k < ssizey + i; k++)
         working_space[j][k] = new Double_t [5 * (ssizez + i)];
   }
   for(k = 0;k < sizez_ext; k++){
      for(j = 0;j < sizey_ext; j++){
        for(i = 0;i < sizex_ext; i++){
            if(i < shift){
               if(j < shift){
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[0][0][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[0][0][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[0][0][k - shift];
               }
 
               else if(j >= ssizey + shift){
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[0][ssizey - 1][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[0][ssizey - 1][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[0][ssizey - 1][k - shift];
               }
 
               else{
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[0][j - shift][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[0][j - shift][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[0][j - shift][k - shift];
               }
            }
 
            else if(i >= ssizex + shift){
               if(j < shift){
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][0][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][0][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][0][k - shift];
               }
 
               else if(j >= ssizey + shift){
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][ssizey - 1][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][ssizey - 1][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][ssizey - 1][k - shift];
               }
 
               else{
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][j - shift][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][j - shift][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][j - shift][k - shift];
               }
            }
 
            else{
               if(j < shift){
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[i - shift][0][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[i - shift][0][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[i - shift][0][k - shift];
               }
 
               else if(j >= ssizey + shift){
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[i - shift][ssizey - 1][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[i - shift][ssizey - 1][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[i - shift][ssizey - 1][k - shift];
               }
 
               else{
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[i - shift][j - shift][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[i - shift][j - shift][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[i - shift][j - shift][k - shift];
               }
            }
         }
      }
   }
   if(backgroundRemove == true){
      for(i = 1;i <= number_of_iterations; i++){
        for(z = i;z < sizez_ext - i; z++){
           for(y = i;y < sizey_ext - i; y++){
             for(x = i;x < sizex_ext - i; x++){
               a = working_space[x][y][z + sizez_ext];
                  p1 = working_space[x + i][y + i][z - i + sizez_ext];
                  p2 = working_space[x - i][y + i][z - i + sizez_ext];
                  p3 = working_space[x + i][y - i][z - i + sizez_ext];
                  p4 = working_space[x - i][y - i][z - i + sizez_ext];
                  p5 = working_space[x + i][y + i][z + i + sizez_ext];
                  p6 = working_space[x - i][y + i][z + i + sizez_ext];
                  p7 = working_space[x + i][y - i][z + i + sizez_ext];
                  p8 = working_space[x - i][y - i][z + i + sizez_ext];
                  s1 = working_space[x + i][y    ][z - i + sizez_ext];
                  s2 = working_space[x    ][y + i][z - i + sizez_ext];
                  s3 = working_space[x - i][y    ][z - i + sizez_ext];
                  s4 = working_space[x    ][y - i][z - i + sizez_ext];
                  s5 = working_space[x + i][y    ][z + i + sizez_ext];
                  s6 = working_space[x    ][y + i][z + i + sizez_ext];
                  s7 = working_space[x - i][y    ][z + i + sizez_ext];
                  s8 = working_space[x    ][y - i][z + i + sizez_ext];
                  s9 = working_space[x - i][y + i][z     + sizez_ext];
                  s10 = working_space[x - i][y - i][z     +sizez_ext];
                  s11 = working_space[x + i][y + i][z     +sizez_ext];
                  s12 = working_space[x + i][y - i][z     +sizez_ext];
                  r1 = working_space[x    ][y    ][z - i + sizez_ext];
                  r2 = working_space[x    ][y    ][z + i + sizez_ext];
                  r3 = working_space[x - i][y    ][z     + sizez_ext];
                  r4 = working_space[x + i][y    ][z     + sizez_ext];
                  r5 = working_space[x    ][y + i][z     + sizez_ext];
                  r6 = working_space[x    ][y - i][z     + sizez_ext];
                  b = (p1 + p3) / 2.0;
                  if(b > s1)
                     s1 = b;
 
                  b = (p1 + p2) / 2.0;
                  if(b > s2)
                     s2 = b;
 
                  b = (p2 + p4) / 2.0;
                  if(b > s3)
                     s3 = b;
 
                  b = (p3 + p4) / 2.0;
                  if(b > s4)
                     s4 = b;
 
                  b = (p5 + p7) / 2.0;
                  if(b > s5)
                     s5 = b;
 
                  b = (p5 + p6) / 2.0;
                  if(b > s6)
                     s6 = b;
 
                  b = (p6 + p8) / 2.0;
                  if(b > s7)
                     s7 = b;
 
                  b = (p7 + p8) / 2.0;
                  if(b > s8)
                     s8 = b;
 
                  b = (p2 + p6) / 2.0;
                  if(b > s9)
                     s9 = b;
 
                  b = (p4 + p8) / 2.0;
                  if(b > s10)
                     s10 = b;
 
                  b = (p1 + p5) / 2.0;
                  if(b > s11)
                     s11 = b;
 
                  b = (p3 + p7) / 2.0;
                  if(b > s12)
                     s12 = b;
 
                  s1 = s1 - (p1 + p3) / 2.0;
                  s2 = s2 - (p1 + p2) / 2.0;
                  s3 = s3 - (p2 + p4) / 2.0;
                  s4 = s4 - (p3 + p4) / 2.0;
                  s5 = s5 - (p5 + p7) / 2.0;
                  s6 = s6 - (p5 + p6) / 2.0;
                  s7 = s7 - (p6 + p8) / 2.0;
                  s8 = s8 - (p7 + p8) / 2.0;
                  s9 = s9 - (p2 + p6) / 2.0;
                  s10 = s10 - (p4 + p8) / 2.0;
                  s11 = s11 - (p1 + p5) / 2.0;
                  s12 = s12 - (p3 + p7) / 2.0;
                  b = (s1 + s3) / 2.0 + (s2 + s4) / 2.0 + (p1 + p2 + p3 + p4) / 4.0;
                  if(b > r1)
                     r1 = b;
 
                  b = (s5 + s7) / 2.0 + (s6 + s8) / 2.0 + (p5 + p6 + p7 + p8) / 4.0;
                  if(b > r2)
                     r2 = b;
 
                  b = (s3 + s7) / 2.0 + (s9 + s10) / 2.0 + (p2 + p4 + p6 + p8) / 4.0;
                  if(b > r3)
                     r3 = b;
 
                  b = (s1 + s5) / 2.0 + (s11 + s12) / 2.0 + (p1 + p3 + p5 + p7) / 4.0;
                  if(b > r4)
                     r4 = b;
 
                  b = (s9 + s11) / 2.0 + (s2 + s6) / 2.0 + (p1 + p2 + p5 + p6) / 4.0;
                  if(b > r5)
                     r5 = b;
 
                  b = (s4 + s8) / 2.0 + (s10 + s12) / 2.0 + (p3 + p4 + p7 + p8) / 4.0;
                  if(b > r6)
                     r6 = b;
 
                  r1 = r1 - ((s1 + s3) / 2.0 + (s2 + s4) / 2.0 + (p1 + p2 + p3 + p4) / 4.0);
                  r2 = r2 - ((s5 + s7) / 2.0 + (s6 + s8) / 2.0 + (p5 + p6 + p7 + p8) / 4.0);
                  r3 = r3 - ((s3 + s7) / 2.0 + (s9 + s10) / 2.0 + (p2 + p4 + p6 + p8) / 4.0);
                  r4 = r4 - ((s1 + s5) / 2.0 + (s11 + s12) / 2.0 + (p1 + p3 + p5 + p7) / 4.0);
                  r5 = r5 - ((s9 + s11) / 2.0 + (s2 + s6) / 2.0 + (p1 + p2 + p5 + p6) / 4.0);
                  r6 = r6 - ((s4 + s8) / 2.0 + (s10 + s12) / 2.0 + (p3 + p4 + p7 + p8) / 4.0);
                  b = (r1 + r2) / 2.0 + (r3 + r4) / 2.0 + (r5 + r6) / 2.0 + (s1 + s3 + s5 + s7) / 4.0 + (s2 + s4 + s6 + s8) / 4.0 + (s9 + s10 + s11 + s12) / 4.0 + (p1 + p2 + p3 + p4 + p5 + p6 + p7 + p8) / 8.0;
                  if(b < a)
                     a = b;
 
                  working_space[x][y][z] = a;
               }
            }
         }
         for(z = i;z < sizez_ext - i; z++){
            for(y = i;y < sizey_ext - i; y++){
               for(x = i;x < sizex_ext - i; x++){
                  working_space[x][y][z + sizez_ext] = working_space[x][y][z];
               }
            }
         }
      }
      for(k = 0;k < sizez_ext; k++){
         for(j = 0;j < sizey_ext; j++){
            for(i = 0;i < sizex_ext; i++){
               if(i < shift){
                  if(j < shift){
                     if(k < shift)
                        working_space[i][j][k + sizez_ext] = source[0][0][0] - working_space[i][j][k + sizez_ext];
 
                     else if(k >= ssizez + shift)
                        working_space[i][j][k + sizez_ext] = source[0][0][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                     else
                        working_space[i][j][k + sizez_ext] = source[0][0][k - shift] - working_space[i][j][k + sizez_ext];
                  }
 
                  else if(j >= ssizey + shift){
                     if(k < shift)
                        working_space[i][j][k + sizez_ext] = source[0][ssizey - 1][0] - working_space[i][j][k + sizez_ext];
 
                     else if(k >= ssizez + shift)
                        working_space[i][j][k + sizez_ext] = source[0][ssizey - 1][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                     else
                        working_space[i][j][k + sizez_ext] = source[0][ssizey - 1][k - shift] - working_space[i][j][k + sizez_ext];
                  }
 
                  else{
                     if(k < shift)
                        working_space[i][j][k + sizez_ext] = source[0][j - shift][0] - working_space[i][j][k + sizez_ext];
 
                     else if(k >= ssizez + shift)
                        working_space[i][j][k + sizez_ext] = source[0][j - shift][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                     else
                        working_space[i][j][k + sizez_ext] = source[0][j - shift][k - shift] - working_space[i][j][k + sizez_ext];
                  }
               }
 
               else if(i >= ssizex + shift){
                  if(j < shift){
                     if(k < shift)
                        working_space[i][j][k + sizez_ext] = source[ssizex - 1][0][0] - working_space[i][j][k + sizez_ext];
 
                     else if(k >= ssizez + shift)
                        working_space[i][j][k + sizez_ext] = source[ssizex - 1][0][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                     else
                        working_space[i][j][k + sizez_ext] = source[ssizex - 1][0][k - shift] - working_space[i][j][k + sizez_ext];
                  }
 
                  else if(j >= ssizey + shift){
                     if(k < shift)
                        working_space[i][j][k + sizez_ext] = source[ssizex - 1][ssizey - 1][0] - working_space[i][j][k + sizez_ext];
 
                     else if(k >= ssizez + shift)
                        working_space[i][j][k + sizez_ext] = source[ssizex - 1][ssizey - 1][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                     else
                        working_space[i][j][k + sizez_ext] = source[ssizex - 1][ssizey - 1][k - shift] - working_space[i][j][k + sizez_ext];
                  }
 
                  else{
                     if(k < shift)
                        working_space[i][j][k + sizez_ext] = source[ssizex - 1][j - shift][0] - working_space[i][j][k + sizez_ext];
 
                     else if(k >= ssizez + shift)
                        working_space[i][j][k + sizez_ext] = source[ssizex - 1][j - shift][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                     else
                        working_space[i][j][k + sizez_ext] = source[ssizex - 1][j - shift][k - shift] - working_space[i][j][k + sizez_ext];
                  }
               }
 
               else{
                  if(j < shift){
                     if(k < shift)
                        working_space[i][j][k + sizez_ext] = source[i - shift][0][0] - working_space[i][j][k + sizez_ext];
 
                     else if(k >= ssizez + shift)
                        working_space[i][j][k + sizez_ext] = source[i - shift][0][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                     else
                        working_space[i][j][k + sizez_ext] = source[i - shift][0][k - shift] - working_space[i][j][k + sizez_ext];
                  }
 
                  else if(j >= ssizey + shift){
                     if(k < shift)
                        working_space[i][j][k + sizez_ext] = source[i - shift][ssizey - 1][0] - working_space[i][j][k + sizez_ext];
 
                     else if(k >= ssizez + shift)
                        working_space[i][j][k + sizez_ext] = source[i - shift][ssizey - 1][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                     else
                        working_space[i][j][k + sizez_ext] = source[i - shift][ssizey - 1][k - shift] - working_space[i][j][k + sizez_ext];
                  }
 
                  else{
                     if(k < shift)
                        working_space[i][j][k + sizez_ext] = source[i - shift][j - shift][0] - working_space[i][j][k + sizez_ext];
 
                     else if(k >= ssizez + shift)
                        working_space[i][j][k + sizez_ext] = source[i - shift][j - shift][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                     else
                        working_space[i][j][k + sizez_ext] = source[i - shift][j - shift][k - shift] - working_space[i][j][k + sizez_ext];
                  }
               }
            }
         }
      }
   }
 
   if(markov == true){
      for(i = 0;i < sizex_ext; i++){
         for(j = 0;j < sizey_ext; j++){
            for(k = 0;k < sizez_ext; k++){
               working_space[i][j][k + 2 * sizez_ext] = working_space[i][j][sizez_ext + k];
               plocha_markov = plocha_markov + working_space[i][j][sizez_ext + k];
            }
         }
      }
      xmin = 0;
      xmax = sizex_ext - 1;
      ymin = 0;
      ymax = sizey_ext - 1;
      zmin = 0;
      zmax = sizez_ext - 1;
      for(i = 0,maxch = 0;i < sizex_ext; i++){
         for(j = 0;j < sizey_ext;j++){
            for(k = 0;k < sizez_ext;k++){
               working_space[i][j][k] = 0;
               if(maxch < working_space[i][j][k + 2 * sizez_ext])
                  maxch = working_space[i][j][k + 2 * sizez_ext];
            }
         }
      }
      if(maxch == 0) {
         k = (Int_t)(4 * sigma + 0.5);
         k = 4 * k;
         for(i = 0;i < ssizex + k; i++){
            for(j = 0;j < ssizey + k; j++)
               delete[] working_space[i][j];
            delete[] working_space[i];
         }
         delete [] working_space;
         return 0;
      }
      nom = 0;
      working_space[xmin][ymin][zmin] = 1;
      for(i = xmin;i < xmax; i++){
         nip = working_space[i][ymin][zmin + 2 * sizez_ext] / maxch;
         nim = working_space[i + 1][ymin][zmin + 2 * sizez_ext] / maxch;
         sp = 0,sm = 0;
         for(l = 1;l <= averWindow; l++){
            if((i + l) > xmax)
               a = working_space[xmax][ymin][zmin + 2 * sizez_ext] / maxch;
 
            else
               a = working_space[i + l][ymin][zmin + 2 * sizez_ext] / maxch;
 
            b = a - nip;
            if(a + nip <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nip);
 
            b = b / a;
            b = TMath::Exp(b);
            sp = sp + b;
            if(i - l + 1 < xmin)
               a = working_space[xmin][ymin][zmin + 2 * sizez_ext] / maxch;
 
            else
               a = working_space[i - l + 1][ymin][zmin + 2 * sizez_ext] / maxch;
 
            b = a - nim;
            if(a + nim <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nim);
 
            b = b / a;
            b = TMath::Exp(b);
            sm = sm + b;
         }
         a = sp / sm;
         a = working_space[i + 1][ymin][zmin] = a * working_space[i][ymin][zmin];
         nom = nom + a;
      }
      for(i = ymin;i < ymax; i++){
         nip = working_space[xmin][i][zmin + 2 * sizez_ext] / maxch;
         nim = working_space[xmin][i + 1][zmin + 2 * sizez_ext] / maxch;
         sp = 0,sm = 0;
         for(l = 1;l <= averWindow; l++){
            if((i + l) > ymax)
               a = working_space[xmin][ymax][zmin + 2 * sizez_ext] / maxch;
 
            else
               a = working_space[xmin][i + l][zmin + 2 * sizez_ext] / maxch;
 
            b = a - nip;
            if(a + nip <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nip);
 
            b = b / a;
            b = TMath::Exp(b);
            sp = sp + b;
            if(i - l + 1 < ymin)
               a = working_space[xmin][ymin][zmin + 2 * sizez_ext] / maxch;
 
            else
               a = working_space[xmin][i - l + 1][zmin + 2 * sizez_ext] / maxch;
 
            b = a - nim;
            if(a + nim <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nim);
 
            b = b / a;
            b = TMath::Exp(b);
            sm = sm + b;
         }
         a = sp / sm;
         a = working_space[xmin][i + 1][zmin] = a * working_space[xmin][i][zmin];
         nom = nom + a;
      }
      for(i = zmin;i < zmax;i++){
         nip = working_space[xmin][ymin][i + 2 * sizez_ext] / maxch;
         nim = working_space[xmin][ymin][i + 1 + 2 * sizez_ext] / maxch;
         sp = 0,sm = 0;
         for(l = 1;l <= averWindow;l++){
            if((i + l) > zmax)
               a = working_space[xmin][ymin][zmax + 2 * sizez_ext] / maxch;
 
            else
               a = working_space[xmin][ymin][i + l + 2 * sizez_ext] / maxch;
 
            b = a - nip;
            if(a + nip <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nip);
 
            b = b / a;
            b = TMath::Exp(b);
            sp = sp + b;
            if(i - l + 1 < zmin)
               a = working_space[xmin][ymin][zmin + 2 * sizez_ext] / maxch;
 
            else
               a = working_space[xmin][ymin][i - l + 1 + 2 * sizez_ext] / maxch;
 
            b = a - nim;
            if(a + nim <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nim);
 
            b = b / a;
            b = TMath::Exp(b);
            sm = sm + b;
         }
         a = sp / sm;
         a = working_space[xmin][ymin][i + 1] = a * working_space[xmin][ymin][i];
         nom = nom + a;
      }
      for(i = xmin;i < xmax; i++){
         for(j = ymin;j < ymax; j++){
            nip = working_space[i][j + 1][zmin + 2 * sizez_ext] / maxch;
            nim = working_space[i + 1][j + 1][zmin + 2 * sizez_ext] / maxch;
            spx = 0,smx = 0;
            for(l = 1;l <= averWindow; l++){
               if(i + l > xmax)
                  a = working_space[xmax][j][zmin + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i + l][j][zmin + 2 * sizez_ext] / maxch;
 
               b = a - nip;
               if(a + nip <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nip);
 
               b = b / a;
               b = TMath::Exp(b);
               spx = spx + b;
               if(i - l + 1 < xmin)
                  a = working_space[xmin][j][zmin + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i - l + 1][j][zmin + 2 * sizez_ext] / maxch;
 
               b = a - nim;
               if(a + nim <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nim);
 
               b = b / a;
               b = TMath::Exp(b);
               smx = smx + b;
            }
            spy = 0,smy = 0;
            nip = working_space[i + 1][j][zmin + 2 * sizez_ext] / maxch;
            nim = working_space[i + 1][j + 1][zmin + 2 * sizez_ext] / maxch;
            for(l = 1;l <= averWindow; l++){
               if(j + l > ymax)
                  a = working_space[i][ymax][zmin + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i][j + l][zmin + 2 * sizez_ext] / maxch;
 
               b = a - nip;
               if(a + nip <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nip);
 
               b = b / a;
               b = TMath::Exp(b);
               spy = spy + b;
               if(j - l + 1 < ymin)
                  a = working_space[i][ymin][zmin + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i][j - l + 1][zmin + 2 * sizez_ext] / maxch;
 
               b = a - nim;
               if(a + nim <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nim);
 
               b = b / a;
               b = TMath::Exp(b);
               smy = smy + b;
            }
            a = (spx * working_space[i][j + 1][zmin] + spy * working_space[i + 1][j][zmin]) / (smx + smy);
            working_space[i + 1][j + 1][zmin] = a;
            nom = nom + a;
         }
      }
      for(i = xmin;i < xmax;i++){
         for(j = zmin;j < zmax;j++){
            nip = working_space[i][ymin][j + 1 + 2 * sizez_ext] / maxch;
            nim = working_space[i + 1][ymin][j + 1 + 2 * sizez_ext] / maxch;
            spx = 0,smx = 0;
            for(l = 1;l <= averWindow; l++){
               if(i + l > xmax)
                 a = working_space[xmax][ymin][j + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i + l][ymin][j + 2 * sizez_ext] / maxch;
 
               b = a - nip;
               if(a + nip <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nip);
 
               b = b / a;
               b = TMath::Exp(b);
               spx = spx + b;
               if(i - l + 1 < xmin)
                  a = working_space[xmin][ymin][j + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i - l + 1][ymin][j + 2 * sizez_ext] / maxch;
 
               b = a - nim;
               if(a + nim <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nim);
 
               b = b / a;
               b = TMath::Exp(b);
               smx = smx + b;
            }
            spz = 0,smz = 0;
            nip = working_space[i + 1][ymin][j + 2 * sizez_ext] / maxch;
            nim = working_space[i + 1][ymin][j + 1 + 2 * sizez_ext] / maxch;
            for(l = 1;l <= averWindow; l++){
               if(j + l > zmax)
                  a = working_space[i][ymin][zmax + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i][ymin][j + l + 2 * sizez_ext] / maxch;
 
               b = a - nip;
               if(a + nip <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nip);
 
               b = b / a;
               b = TMath::Exp(b);
               spz = spz + b;
               if(j - l + 1 < zmin)
                  a = working_space[i][ymin][zmin + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i][ymin][j - l + 1 + 2 * sizez_ext] / maxch;
 
               b = a - nim;
               if(a + nim <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nim);
 
               b = b / a;
               b = TMath::Exp(b);
               smz = smz + b;
            }
            a = (spx * working_space[i][ymin][j + 1] + spz * working_space[i + 1][ymin][j]) / (smx + smz);
            working_space[i + 1][ymin][j + 1] = a;
            nom = nom + a;
         }
      }
      for(i = ymin;i < ymax;i++){
         for(j = zmin;j < zmax;j++){
            nip = working_space[xmin][i][j + 1 + 2 * sizez_ext] / maxch;
            nim = working_space[xmin][i + 1][j + 1 + 2 * sizez_ext] / maxch;
            spy = 0,smy = 0;
            for(l = 1;l <= averWindow; l++){
               if(i + l > ymax)
                  a = working_space[xmin][ymax][j + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[xmin][i + l][j + 2 * sizez_ext] / maxch;
 
               b = a - nip;
               if(a + nip <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nip);
 
               b = b / a;
               b = TMath::Exp(b);
               spy = spy + b;
               if(i - l + 1 < ymin)
                  a = working_space[xmin][ymin][j + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[xmin][i - l + 1][j + 2 * sizez_ext] / maxch;
 
               b = a - nim;
               if(a + nim <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nim);
 
               b = b / a;
               b = TMath::Exp(b);
               smy = smy + b;
            }
            spz = 0,smz = 0;
            nip = working_space[xmin][i + 1][j + 2 * sizez_ext] / maxch;
            nim = working_space[xmin][i + 1][j + 1 + 2 * sizez_ext] / maxch;
            for(l = 1;l <= averWindow; l++){
               if(j + l > zmax)
                  a = working_space[xmin][i][zmax + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[xmin][i][j + l + 2 * sizez_ext] / maxch;
 
               b = a - nip;
               if(a + nip <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nip);
 
               b = b / a;
               b = TMath::Exp(b);
               spz = spz + b;
               if(j - l + 1 < zmin)
                  a = working_space[xmin][i][zmin + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[xmin][i][j - l + 1 + 2 * sizez_ext] / maxch;
 
               b = a - nim;
               if(a + nim <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nim);
 
               b = b / a;
               b = TMath::Exp(b);
               smz = smz + b;
            }
            a = (spy * working_space[xmin][i][j + 1] + spz * working_space[xmin][i + 1][j]) / (smy + smz);
            working_space[xmin][i + 1][j + 1] = a;
            nom = nom + a;
         }
      }
      for(i = xmin;i < xmax; i++){
         for(j = ymin;j < ymax; j++){
            for(k = zmin;k < zmax; k++){
               nip = working_space[i][j + 1][k + 1 + 2 * sizez_ext] / maxch;
               nim = working_space[i + 1][j + 1][k + 1 + 2 * sizez_ext] / maxch;
               spx = 0,smx = 0;
               for(l = 1;l <= averWindow; l++){
                  if(i + l > xmax)
                     a = working_space[xmax][j][k + 2 * sizez_ext] / maxch;
 
                  else
                     a = working_space[i + l][j][k + 2 * sizez_ext] / maxch;
 
                  b = a - nip;
                  if(a + nip <= 0)
                     a = 1;
 
                  else
                     a = TMath::Sqrt(a + nip);
 
                  b = b / a;
                  b = TMath::Exp(b);
                  spx = spx + b;
                  if(i - l + 1 < xmin)
                     a = working_space[xmin][j][k + 2 * sizez_ext] / maxch;
 
                  else
                     a = working_space[i - l + 1][j][k + 2 * sizez_ext] / maxch;
 
                  b = a - nim;
                  if(a + nim <= 0)
                     a = 1;
 
                  else
                     a = TMath::Sqrt(a + nim);
 
                  b = b / a;
                  b = TMath::Exp(b);
                  smx = smx + b;
               }
               spy = 0,smy = 0;
               nip = working_space[i + 1][j][k + 1 + 2 * sizez_ext] / maxch;
               nim = working_space[i + 1][j + 1][k + 1 + 2 * sizez_ext] / maxch;
               for(l = 1;l <= averWindow; l++){
                  if(j + l > ymax)
                     a = working_space[i][ymax][k + 2 * sizez_ext] / maxch;
 
                  else
                     a = working_space[i][j + l][k + 2 * sizez_ext] / maxch;
 
                  b = a - nip;
                  if(a + nip <= 0)
                     a = 1;
 
                  else
                     a = TMath::Sqrt(a + nip);
 
                  b = b / a;
                  b = TMath::Exp(b);
                  spy = spy + b;
                  if(j - l + 1 < ymin)
                     a = working_space[i][ymin][k + 2 * sizez_ext] / maxch;
 
                  else
                     a = working_space[i][j - l + 1][k + 2 * sizez_ext] / maxch;
 
                  b = a - nim;
                  if(a + nim <= 0)
                     a = 1;
 
                  else
                     a = TMath::Sqrt(a + nim);
 
                  b = b / a;
                  b = TMath::Exp(b);
                  smy = smy + b;
               }
               spz = 0,smz = 0;
               nip = working_space[i + 1][j + 1][k + 2 * sizez_ext] / maxch;
               nim = working_space[i + 1][j + 1][k + 1 + 2 * sizez_ext] / maxch;
               for(l = 1;l <= averWindow; l++ ){
                  if(j + l > zmax)
                     a = working_space[i][j][zmax + 2 * sizez_ext] / maxch;
 
                  else
                     a = working_space[i][j][k + l + 2 * sizez_ext] / maxch;
 
                  b = a - nip;
                  if(a + nip <= 0)
                     a = 1;
 
                  else
                     a = TMath::Sqrt(a + nip);
 
                  b = b / a;
                  b = TMath::Exp(b);
                  spz = spz + b;
                  if(j - l + 1 < ymin)
                     a = working_space[i][j][zmin + 2 * sizez_ext] / maxch;
 
                  else
                     a = working_space[i][j][k - l + 1 + 2 * sizez_ext] / maxch;
 
                  b = a - nim;
                  if(a + nim <= 0)
                     a = 1;
 
                  else
                     a = TMath::Sqrt(a + nim);
 
                  b = b / a;
                  b = TMath::Exp(b);
                  smz = smz + b;
               }
               a = (spx * working_space[i][j + 1][k + 1] + spy * working_space[i + 1][j][k + 1] + spz * working_space[i + 1][j + 1][k]) / (smx + smy + smz);
               working_space[i + 1][j + 1][k + 1] = a;
               nom = nom + a;
            }
         }
      }
      a = 0;
      for(i = xmin;i <= xmax; i++){
         for(j = ymin;j <= ymax; j++){
            for(k = zmin;k <= zmax; k++){
               working_space[i][j][k] = working_space[i][j][k] / nom;
               a+=working_space[i][j][k];
            }
         }
      }
      for(i = 0;i < sizex_ext; i++){
         for(j = 0;j < sizey_ext; j++){
            for(k = 0;k < sizez_ext; k++){
               working_space[i][j][k + sizez_ext] = working_space[i][j][k] * plocha_markov / a;
            }
         }
      }
   }
   //deconvolution starts
   area = 0;
   lhx = -1,lhy = -1,lhz = -1;
   positx = 0,posity = 0,positz = 0;
   maximum = 0;
   //generate response cube
   for(i = 0;i < sizex_ext; i++){
      for(j = 0;j < sizey_ext; j++){
         for(k = 0;k < sizez_ext; k++){
            lda = (Double_t)i - 3 * sigma;
            ldb = (Double_t)j - 3 * sigma;
            ldc = (Double_t)k - 3 * sigma;
            lda = (lda * lda + ldb * ldb + ldc * ldc) / (2 * sigma * sigma);
            l = (Int_t)(1000 * exp(-lda));
            lda = l;
            if(lda!=0){
               if((i + 1) > lhx)
                  lhx = i + 1;
 
               if((j + 1) > lhy)
                  lhy = j + 1;
 
               if((k + 1) > lhz)
                  lhz = k + 1;
            }
            working_space[i][j][k] = lda;
            area = area + lda;
            if(lda > maximum){
               maximum = lda;
               positx = i,posity = j,positz = k;
            }
         }
      }
   }
   //read source cube
   for(i = 0;i < sizex_ext; i++){
      for(j = 0;j < sizey_ext; j++){
         for(k = 0;k < sizez_ext; k++){
            working_space[i][j][k + 2 * sizez_ext] = TMath::Abs(working_space[i][j][k + sizez_ext]);
         }
      }
   }
   //calculate ht*y and write into p
   for (i3 = 0; i3 < sizez_ext; i3++) {
      for (i2 = 0; i2 < sizey_ext; i2++) {
         for (i1 = 0; i1 < sizex_ext; i1++) {
            ldc = 0;
            for (j3 = 0; j3 <= (lhz - 1); j3++) {
               for (j2 = 0; j2 <= (lhy - 1); j2++) {
                  for (j1 = 0; j1 <= (lhx - 1); j1++) {
                     k3 = i3 + j3, k2 = i2 + j2, k1 = i1 + j1;
                     if (k3 >= 0 && k3 < sizez_ext && k2 >= 0 && k2 < sizey_ext && k1 >= 0 && k1 < sizex_ext) {
                        lda = working_space[j1][j2][j3];
                        ldb = working_space[k1][k2][k3+2*sizez_ext];
                        ldc = ldc + lda * ldb;
                     }
                  }
               }
            }
            working_space[i1][i2][i3 + sizez_ext] = ldc;
         }
      }
   }
//calculate b=ht*h
   i1min = -(lhx - 1), i1max = lhx - 1;
   i2min = -(lhy - 1), i2max = lhy - 1;
   i3min = -(lhz - 1), i3max = lhz - 1;
   for (i3 = i3min; i3 <= i3max; i3++) {
      for (i2 = i2min; i2 <= i2max; i2++) {
         for (i1 = i1min; i1 <= i1max; i1++) {
            ldc = 0;
            j3min = -i3;
            if (j3min < 0)
               j3min = 0;
 
            j3max = lhz - 1 - i3;
            if (j3max > lhz - 1)
               j3max = lhz - 1;
 
            for (j3 = j3min; j3 <= j3max; j3++) {
               j2min = -i2;
               if (j2min < 0)
                  j2min = 0;
 
               j2max = lhy - 1 - i2;
               if (j2max > lhy - 1)
                  j2max = lhy - 1;
 
               for (j2 = j2min; j2 <= j2max; j2++) {
                  j1min = -i1;
                  if (j1min < 0)
                     j1min = 0;
 
                  j1max = lhx - 1 - i1;
                  if (j1max > lhx - 1)
                     j1max = lhx - 1;
 
                  for (j1 = j1min; j1 <= j1max; j1++) {
                     lda = working_space[j1][j2][j3];
                     if (i1 + j1 < sizex_ext && i2 + j2 < sizey_ext)
                        ldb = working_space[i1 + j1][i2 + j2][i3 + j3];
 
                     else
                        ldb = 0;
 
                     ldc = ldc + lda * ldb;
                  }
               }
            }
            working_space[i1 - i1min][i2 - i2min][i3 - i3min + 2 * sizez_ext ] = ldc;
         }
      }
   }
//initialization in x1 cube
   for (i3 = 0; i3 < sizez_ext; i3++) {
      for (i2 = 0; i2 < sizey_ext; i2++) {
         for (i1 = 0; i1 < sizex_ext; i1++) {
            working_space[i1][i2][i3 + 3 * sizez_ext] = 1;
            working_space[i1][i2][i3 + 4 * sizez_ext] = 0;
         }
      }
   }
 
//START OF ITERATIONS
   for (lindex=0;lindex<deconIterations;lindex++){
      for (i3 = 0; i3 < sizez_ext; i3++) {
         for (i2 = 0; i2 < sizey_ext; i2++) {
            for (i1 = 0; i1 < sizex_ext; i1++) {
               if (TMath::Abs(working_space[i1][i2][i3 + 3 * sizez_ext])>1e-6 && TMath::Abs(working_space[i1][i2][i3 + 1 * sizez_ext])>1e-6){
                  ldb = 0;
                  j3min = i3;
                  if (j3min > lhz - 1)
                     j3min = lhz - 1;
 
                  j3min = -j3min;
                  j3max = sizez_ext - i3 - 1;
                  if (j3max > lhz - 1)
                     j3max = lhz - 1;
 
                  j2min = i2;
                  if (j2min > lhy - 1)
                     j2min = lhy - 1;
 
                  j2min = -j2min;
                  j2max = sizey_ext - i2 - 1;
                  if (j2max > lhy - 1)
                     j2max = lhy - 1;
 
                  j1min = i1;
                  if (j1min > lhx - 1)
                     j1min = lhx - 1;
 
                  j1min = -j1min;
                  j1max = sizex_ext - i1 - 1;
                  if (j1max > lhx - 1)
                     j1max = lhx - 1;
 
                  for (j3 = j3min; j3 <= j3max; j3++) {
                     for (j2 = j2min; j2 <= j2max; j2++) {
                        for (j1 = j1min; j1 <= j1max; j1++) {
                           ldc =  working_space[j1 - i1min][j2 - i2min][j3 - i3min + 2 * sizez_ext];
                           lda = working_space[i1 + j1][i2 + j2][i3 + j3 + 3 * sizez_ext];
                           ldb = ldb + lda * ldc;
                        }
                     }
                  }
                  lda = working_space[i1][i2][i3 + 3 * sizez_ext];
                  ldc = working_space[i1][i2][i3 + 1 * sizez_ext];
                  if (ldc * lda != 0 && ldb != 0) {
                     lda = lda * ldc / ldb;
                  }
 
                  else
                     lda = 0;
                  working_space[i1][i2][i3 + 4 * sizez_ext] = lda;
               }
            }
         }
      }
      for (i3 = 0; i3 < sizez_ext; i3++) {
         for (i2 = 0; i2 < sizey_ext; i2++) {
            for (i1 = 0; i1 < sizex_ext; i1++)
               working_space[i1][i2][i3 + 3 * sizez_ext] = working_space[i1][i2][i3 + 4 * sizez_ext];
         }
      }
   }
//write back resulting spectrum
   maximum=0;
  for(i = 0;i < sizex_ext; i++){
      for(j = 0;j < sizey_ext; j++){
         for(k = 0;k < sizez_ext; k++){
            working_space[(i + positx) % sizex_ext][(j + posity) % sizey_ext][(k + positz) % sizez_ext] = area * working_space[i][j][k + 3 * sizez_ext];
            if(maximum < working_space[(i + positx) % sizex_ext][(j + posity) % sizey_ext][(k + positz) % sizez_ext])
               maximum = working_space[(i + positx) % sizex_ext][(j + posity) % sizey_ext][(k + positz) % sizez_ext];
         }
      }
   }
//searching for peaks in deconvolved spectrum
   for(i = 1;i < sizex_ext - 1; i++){
      for(j = 1;j < sizey_ext - 1; j++){
         for(l = 1;l < sizez_ext - 1; l++){
            a = working_space[i][j][l];
            if(a > working_space[i][j][l - 1] && a > working_space[i - 1][j][l - 1] && a > working_space[i - 1][j - 1][l - 1] && a > working_space[i][j - 1][l - 1] && a > working_space[i + 1][j - 1][l - 1] && a > working_space[i + 1][j][l - 1] && a > working_space[i + 1][j + 1][l - 1] && a > working_space[i][j + 1][l - 1] && a > working_space[i - 1][j + 1][l - 1] && a > working_space[i - 1][j][l] && a > working_space[i - 1][j - 1][l] && a > working_space[i][j - 1][l] && a > working_space[i + 1][j - 1][l] && a > working_space[i + 1][j][l] && a > working_space[i + 1][j + 1][l] && a > working_space[i][j + 1][l] && a > working_space[i - 1][j + 1][l] && a > working_space[i][j][l + 1] && a > working_space[i - 1][j][l + 1] && a > working_space[i - 1][j - 1][l + 1] && a > working_space[i][j - 1][l + 1] && a > working_space[i + 1][j - 1][l + 1] && a > working_space[i + 1][j][l + 1] && a > working_space[i + 1][j + 1][l + 1] && a > working_space[i][j + 1][l + 1] && a > working_space[i - 1][j + 1][l + 1]){
               if(i >= shift && i < ssizex + shift && j >= shift && j < ssizey + shift && l >= shift && l < ssizez + shift){
                  if(working_space[i][j][l] > threshold * maximum / 100.0){
                     if(peak_index < fMaxPeaks){
                        for(k = i - 1,a = 0,b = 0;k <= i + 1; k++){
                           a += (Double_t)(k - shift) * working_space[k][j][l];
                           b += working_space[k][j][l];
                        }
                     fPositionX[peak_index] = a / b;
                        for(k = j - 1,a = 0,b = 0;k <= j + 1; k++){
                           a += (Double_t)(k - shift) * working_space[i][k][l];
                           b += working_space[i][k][l];
                        }
                        fPositionY[peak_index] = a / b;
                        for(k = l - 1,a = 0,b = 0;k <= l + 1; k++){
                           a += (Double_t)(k - shift) * working_space[i][j][k];
                           b += working_space[i][j][k];
                        }
                        fPositionZ[peak_index] = a / b;
                        peak_index += 1;
                     }
                  }
               }
            }
         }
      }
   }
   for(i = 0;i < ssizex; i++){
      for(j = 0;j < ssizey; j++){
         for(k = 0;k < ssizez; k++){
            dest[i][j][k] = working_space[i + shift][j + shift][k + shift];
         }
      }
   }
   k = (Int_t)(4 * sigma + 0.5);
   k = 4 * k;
   for(i = 0;i < ssizex + k; i++){
      for(j = 0;j < ssizey + k; j++)
         delete[] working_space[i][j];
      delete[] working_space[i];
   }
   delete[] working_space;
   fNPeaks = peak_index;
   return fNPeaks;
}
 
////////////////////////////////////////////////////////////////////////////////
/// THREE-DIMENSIONAL CLASSICAL PEAK SEARCH FUNCTION
/// This function searches for peaks in source spectrum using
///  the algorithm based on smoothed second differences.
///
/// Function parameters:
///  - source-pointer to the matrix of source spectrum
///  - ssizex-x length of source spectrum
///  - ssizey-y length of source spectrum
///  - ssizez-z length of source spectrum
///  - sigma-sigma of searched peaks, for details we refer to manual
///  - threshold-threshold value in % for selected peaks, peaks with
///    amplitude less than threshold*highest_peak/100
///    are ignored, see manual
///  - markov-logical variable, if it is true, first the source spectrum
///    is replaced by new spectrum calculated using Markov
///    chains method.
///  - averWindow-averaging window of searched peaks, for details
///                  we refer to manual (applies only for Markov method)
 
Int_t TSpectrum3::SearchFast(const Double_t***source, Double_t***dest, Int_t ssizex, Int_t ssizey, Int_t ssizez,
                                 Double_t sigma, Double_t threshold,
                                 Bool_t markov, Int_t averWindow)
 
{
   Int_t i,j,k,l,li,lj,lk,lmin,lmax,xmin,xmax,ymin,ymax,zmin,zmax;
   Double_t maxch,plocha_markov = 0;
   Double_t nom,nip,nim,sp,sm,spx,spy,smx,smy,spz,smz;
   Double_t norma,val,val1,val2,val3,val4,val5,val6,val7,val8,val9,val10,val11,val12,val13,val14,val15,val16,val17,val18,val19,val20,val21,val22,val23,val24,val25,val26;
   Double_t a,b,s,f,maximum;
   Int_t x,y,z,peak_index=0;
   Double_t p1,p2,p3,p4,p5,p6,p7,p8,s1,s2,s3,s4,s5,s6,s7,s8,s9,s10,s11,s12,r1,r2,r3,r4,r5,r6;
   Double_t pocet_sigma = 5;
   Int_t number_of_iterations=(Int_t)(4 * sigma + 0.5);
   Int_t sizex_ext=ssizex + 4 * number_of_iterations,sizey_ext = ssizey + 4 * number_of_iterations,sizez_ext = ssizez + 4 * number_of_iterations,shift = 2 * number_of_iterations;
   Double_t c[PEAK_WINDOW],s_f_ratio_peaks = 5;
   if(sigma < 1){
      Error("SearchFast", "Invalid sigma, must be greater than or equal to 1");
      return 0;
   }
 
   if(threshold<=0||threshold>=100){
      Error("SearchFast", "Invalid threshold, must be positive and less than 100");
      return 0;
   }
 
   j = (Int_t)(pocet_sigma*sigma+0.5);
   if (j >= PEAK_WINDOW / 2) {
      Error("SearchFast", "Too large sigma");
      return 0;
   }
 
   if (markov == true) {
      if (averWindow <= 0) {
         Error("SearchFast", "Averaging window must be positive");
         return 0;
      }
   }
 
   if(sizex_ext < 2 * number_of_iterations + 1 || sizey_ext < 2 * number_of_iterations + 1 || sizez_ext < 2 * number_of_iterations + 1){
      Error("SearchFast", "Too large clipping window");
      return 0;
   }
 
   i = (Int_t)(4 * sigma + 0.5);
   i = 4 * i;
   Double_t ***working_space = new Double_t** [ssizex + i];
   for(j = 0;j < ssizex + i; j++){
      working_space[j] = new Double_t* [ssizey + i];
      for(k = 0;k < ssizey + i; k++)
         working_space[j][k] = new Double_t [4 * (ssizez + i)];
   }
 
   for(k = 0;k < sizez_ext; k++){
      for(j = 0;j < sizey_ext; j++){
        for(i = 0;i < sizex_ext; i++){
            if(i < shift){
               if(j < shift){
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[0][0][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[0][0][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[0][0][k - shift];
               }
 
               else if(j >= ssizey + shift){
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[0][ssizey - 1][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[0][ssizey - 1][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[0][ssizey - 1][k - shift];
               }
 
               else{
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[0][j - shift][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[0][j - shift][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[0][j - shift][k - shift];
               }
            }
 
            else if(i >= ssizex + shift){
               if(j < shift){
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][0][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][0][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][0][k - shift];
               }
 
               else if(j >= ssizey + shift){
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][ssizey - 1][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][ssizey - 1][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][ssizey - 1][k - shift];
               }
 
               else{
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][j - shift][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][j - shift][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[ssizex - 1][j - shift][k - shift];
               }
            }
 
            else{
               if(j < shift){
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[i - shift][0][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[i - shift][0][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[i - shift][0][k - shift];
               }
 
               else if(j >= ssizey + shift){
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[i - shift][ssizey - 1][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[i - shift][ssizey - 1][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[i - shift][ssizey - 1][k - shift];
               }
 
               else{
                  if(k < shift)
                     working_space[i][j][k + sizez_ext] = source[i - shift][j - shift][0];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + sizez_ext] = source[i - shift][j - shift][ssizez - 1];
 
                  else
                     working_space[i][j][k + sizez_ext] = source[i - shift][j - shift][k - shift];
               }
            }
         }
      }
   }
   for(i = 1;i <= number_of_iterations; i++){
      for(z = i;z < sizez_ext - i; z++){
         for(y = i;y < sizey_ext - i; y++){
            for(x = i;x < sizex_ext - i; x++){
               a = working_space[x][y][z + sizez_ext];
               p1 = working_space[x + i][y + i][z - i + sizez_ext];
               p2 = working_space[x - i][y + i][z - i + sizez_ext];
               p3 = working_space[x + i][y - i][z - i + sizez_ext];
               p4 = working_space[x - i][y - i][z - i + sizez_ext];
               p5 = working_space[x + i][y + i][z + i + sizez_ext];
               p6 = working_space[x - i][y + i][z + i + sizez_ext];
               p7 = working_space[x + i][y - i][z + i + sizez_ext];
               p8 = working_space[x - i][y - i][z + i + sizez_ext];
               s1 = working_space[x + i][y    ][z - i + sizez_ext];
               s2 = working_space[x    ][y + i][z - i + sizez_ext];
               s3 = working_space[x - i][y    ][z - i + sizez_ext];
               s4 = working_space[x    ][y - i][z - i + sizez_ext];
               s5 = working_space[x + i][y    ][z + i + sizez_ext];
               s6 = working_space[x    ][y + i][z + i + sizez_ext];
               s7 = working_space[x - i][y    ][z + i + sizez_ext];
               s8 = working_space[x    ][y - i][z + i + sizez_ext];
               s9 = working_space[x - i][y + i][z     + sizez_ext];
               s10 = working_space[x - i][y - i][z     +sizez_ext];
               s11 = working_space[x + i][y + i][z     +sizez_ext];
               s12 = working_space[x + i][y - i][z     +sizez_ext];
               r1 = working_space[x    ][y    ][z - i + sizez_ext];
               r2 = working_space[x    ][y    ][z + i + sizez_ext];
               r3 = working_space[x - i][y    ][z     + sizez_ext];
               r4 = working_space[x + i][y    ][z     + sizez_ext];
               r5 = working_space[x    ][y + i][z     + sizez_ext];
               r6 = working_space[x    ][y - i][z     + sizez_ext];
               b = (p1 + p3) / 2.0;
               if(b > s1)
                  s1 = b;
 
               b = (p1 + p2) / 2.0;
               if(b > s2)
                  s2 = b;
 
               b = (p2 + p4) / 2.0;
               if(b > s3)
                  s3 = b;
 
               b = (p3 + p4) / 2.0;
               if(b > s4)
                  s4 = b;
 
               b = (p5 + p7) / 2.0;
               if(b > s5)
                  s5 = b;
 
               b = (p5 + p6) / 2.0;
               if(b > s6)
                  s6 = b;
 
               b = (p6 + p8) / 2.0;
               if(b > s7)
                  s7 = b;
 
               b = (p7 + p8) / 2.0;
               if(b > s8)
                  s8 = b;
 
               b = (p2 + p6) / 2.0;
               if(b > s9)
                  s9 = b;
 
               b = (p4 + p8) / 2.0;
               if(b > s10)
                  s10 = b;
 
               b = (p1 + p5) / 2.0;
               if(b > s11)
                  s11 = b;
 
               b = (p3 + p7) / 2.0;
               if(b > s12)
                  s12 = b;
 
               s1 = s1 - (p1 + p3) / 2.0;
               s2 = s2 - (p1 + p2) / 2.0;
               s3 = s3 - (p2 + p4) / 2.0;
               s4 = s4 - (p3 + p4) / 2.0;
               s5 = s5 - (p5 + p7) / 2.0;
               s6 = s6 - (p5 + p6) / 2.0;
               s7 = s7 - (p6 + p8) / 2.0;
               s8 = s8 - (p7 + p8) / 2.0;
               s9 = s9 - (p2 + p6) / 2.0;
               s10 = s10 - (p4 + p8) / 2.0;
               s11 = s11 - (p1 + p5) / 2.0;
               s12 = s12 - (p3 + p7) / 2.0;
               b = (s1 + s3) / 2.0 + (s2 + s4) / 2.0 + (p1 + p2 + p3 + p4) / 4.0;
               if(b > r1)
                  r1 = b;
 
               b = (s5 + s7) / 2.0 + (s6 + s8) / 2.0 + (p5 + p6 + p7 + p8) / 4.0;
               if(b > r2)
                  r2 = b;
 
               b = (s3 + s7) / 2.0 + (s9 + s10) / 2.0 + (p2 + p4 + p6 + p8) / 4.0;
               if(b > r3)
                  r3 = b;
 
               b = (s1 + s5) / 2.0 + (s11 + s12) / 2.0 + (p1 + p3 + p5 + p7) / 4.0;
               if(b > r4)
                  r4 = b;
 
               b = (s9 + s11) / 2.0 + (s2 + s6) / 2.0 + (p1 + p2 + p5 + p6) / 4.0;
               if(b > r5)
                  r5 = b;
 
               b = (s4 + s8) / 2.0 + (s10 + s12) / 2.0 + (p3 + p4 + p7 + p8) / 4.0;
               if(b > r6)
                  r6 = b;
 
               r1 = r1 - ((s1 + s3) / 2.0 + (s2 + s4) / 2.0 + (p1 + p2 + p3 + p4) / 4.0);
               r2 = r2 - ((s5 + s7) / 2.0 + (s6 + s8) / 2.0 + (p5 + p6 + p7 + p8) / 4.0);
               r3 = r3 - ((s3 + s7) / 2.0 + (s9 + s10) / 2.0 + (p2 + p4 + p6 + p8) / 4.0);
               r4 = r4 - ((s1 + s5) / 2.0 + (s11 + s12) / 2.0 + (p1 + p3 + p5 + p7) / 4.0);
               r5 = r5 - ((s9 + s11) / 2.0 + (s2 + s6) / 2.0 + (p1 + p2 + p5 + p6) / 4.0);
               r6 = r6 - ((s4 + s8) / 2.0 + (s10 + s12) / 2.0 + (p3 + p4 + p7 + p8) / 4.0);
               b = (r1 + r2) / 2.0 + (r3 + r4) / 2.0 + (r5 + r6) / 2.0 + (s1 + s3 + s5 + s7) / 4.0 + (s2 + s4 + s6 + s8) / 4.0 + (s9 + s10 + s11 + s12) / 4.0 + (p1 + p2 + p3 + p4 + p5 + p6 + p7 + p8) / 8.0;
               if(b < a)
                  a = b;
 
               working_space[x][y][z] = a;
            }
         }
      }
      for(z = i;z < sizez_ext - i; z++){
         for(y = i;y < sizey_ext - i; y++){
            for(x = i;x < sizex_ext - i; x++){
               working_space[x][y][z + sizez_ext] = working_space[x][y][z];
            }
         }
      }
   }
   for(k = 0;k < sizez_ext; k++){
      for(j = 0;j < sizey_ext; j++){
         for(i = 0;i < sizex_ext; i++){
            if(i < shift){
               if(j < shift){
                  if(k < shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[0][0][0] - working_space[i][j][k + sizez_ext];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[0][0][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                  else
                     working_space[i][j][k + 3 * sizez_ext] = source[0][0][k - shift] - working_space[i][j][k + sizez_ext];
               }
 
               else if(j >= ssizey + shift){
                  if(k < shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[0][ssizey - 1][0] - working_space[i][j][k + sizez_ext];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[0][ssizey - 1][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                  else
                     working_space[i][j][k + 3 * sizez_ext] = source[0][ssizey - 1][k - shift] - working_space[i][j][k + sizez_ext];
               }
 
               else{
                  if(k < shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[0][j - shift][0] - working_space[i][j][k + sizez_ext];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[0][j - shift][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                  else
                     working_space[i][j][k + 3 * sizez_ext] = source[0][j - shift][k - shift] - working_space[i][j][k + sizez_ext];
               }
            }
 
            else if(i >= ssizex + shift){
               if(j < shift){
                  if(k < shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[ssizex - 1][0][0] - working_space[i][j][k + sizez_ext];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[ssizex - 1][0][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                  else
                     working_space[i][j][k + 3 * sizez_ext] = source[ssizex - 1][0][k - shift] - working_space[i][j][k + sizez_ext];
               }
 
               else if(j >= ssizey + shift){
                  if(k < shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[ssizex - 1][ssizey - 1][0] - working_space[i][j][k + sizez_ext];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[ssizex - 1][ssizey - 1][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                  else
                     working_space[i][j][k + 3 * sizez_ext] = source[ssizex - 1][ssizey - 1][k - shift] - working_space[i][j][k + sizez_ext];
               }
 
               else{
                  if(k < shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[ssizex - 1][j - shift][0] - working_space[i][j][k + sizez_ext];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[ssizex - 1][j - shift][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                  else
                     working_space[i][j][k + 3 * sizez_ext] = source[ssizex - 1][j - shift][k - shift] - working_space[i][j][k + sizez_ext];
               }
            }
 
            else{
               if(j < shift){
                  if(k < shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[i - shift][0][0] - working_space[i][j][k + sizez_ext];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[i - shift][0][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                  else
                     working_space[i][j][k + 3 * sizez_ext] = source[i - shift][0][k - shift] - working_space[i][j][k + sizez_ext];
               }
 
               else if(j >= ssizey + shift){
                  if(k < shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[i - shift][ssizey - 1][0] - working_space[i][j][k + sizez_ext];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[i - shift][ssizey - 1][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                  else
                     working_space[i][j][k + 3 * sizez_ext] = source[i - shift][ssizey - 1][k - shift] - working_space[i][j][k + sizez_ext];
               }
 
               else{
                  if(k < shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[i - shift][j - shift][0] - working_space[i][j][k + sizez_ext];
 
                  else if(k >= ssizez + shift)
                     working_space[i][j][k + 3 * sizez_ext] = source[i - shift][j - shift][ssizez - 1] - working_space[i][j][k + sizez_ext];
 
                  else
                     working_space[i][j][k + 3 * sizez_ext] = source[i - shift][j - shift][k - shift] - working_space[i][j][k + sizez_ext];
               }
            }
         }
      }
   }
 
   for(i = 0;i < sizex_ext; i++){
      for(j = 0;j < sizey_ext; j++){
         for(k = 0;k < sizez_ext; k++){
            if(i >= shift && i < ssizex + shift && j >= shift && j < ssizey + shift && k >= shift && k < ssizez + shift){
               working_space[i][j][k + 2 * sizez_ext] = source[i - shift][j - shift][k - shift];
               plocha_markov = plocha_markov + source[i - shift][j - shift][k - shift];
            }
            else
               working_space[i][j][k + 2 * sizez_ext] = 0;
         }
      }
   }
 
   if(markov == true){
      xmin = 0;
      xmax = sizex_ext - 1;
      ymin = 0;
      ymax = sizey_ext - 1;
      zmin = 0;
      zmax = sizez_ext - 1;
      for(i = 0,maxch = 0;i < sizex_ext; i++){
         for(j = 0;j < sizey_ext;j++){
            for(k = 0;k < sizez_ext;k++){
               working_space[i][j][k] = 0;
               if(maxch < working_space[i][j][k + 2 * sizez_ext])
                  maxch = working_space[i][j][k + 2 * sizez_ext];
            }
         }
      }
      if(maxch == 0) {
         k = (Int_t)(4 * sigma + 0.5);
         k = 4 * k;
         for(i = 0;i < ssizex + k; i++){
            for(j = 0;j < ssizey + k; j++)
               delete[] working_space[i][j];
            delete[] working_space[i];
         }
         delete [] working_space;
         return 0;
      }
 
      nom = 0;
      working_space[xmin][ymin][zmin] = 1;
      for(i = xmin;i < xmax; i++){
         nip = working_space[i][ymin][zmin + 2 * sizez_ext] / maxch;
         nim = working_space[i + 1][ymin][zmin + 2 * sizez_ext] / maxch;
         sp = 0,sm = 0;
         for(l = 1;l <= averWindow; l++){
            if((i + l) > xmax)
               a = working_space[xmax][ymin][zmin + 2 * sizez_ext] / maxch;
 
            else
               a = working_space[i + l][ymin][zmin + 2 * sizez_ext] / maxch;
 
            b = a - nip;
            if(a + nip <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nip);
 
            b = b / a;
            b = TMath::Exp(b);
            sp = sp + b;
            if(i - l + 1 < xmin)
               a = working_space[xmin][ymin][zmin + 2 * sizez_ext] / maxch;
 
            else
               a = working_space[i - l + 1][ymin][zmin + 2 * sizez_ext] / maxch;
 
            b = a - nim;
            if(a + nim <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nim);
 
            b = b / a;
            b = TMath::Exp(b);
            sm = sm + b;
         }
         a = sp / sm;
         a = working_space[i + 1][ymin][zmin] = a * working_space[i][ymin][zmin];
         nom = nom + a;
      }
      for(i = ymin;i < ymax; i++){
         nip = working_space[xmin][i][zmin + 2 * sizez_ext] / maxch;
         nim = working_space[xmin][i + 1][zmin + 2 * sizez_ext] / maxch;
         sp = 0,sm = 0;
         for(l = 1;l <= averWindow; l++){
            if((i + l) > ymax)
               a = working_space[xmin][ymax][zmin + 2 * sizez_ext] / maxch;
 
            else
               a = working_space[xmin][i + l][zmin + 2 * sizez_ext] / maxch;
 
            b = a - nip;
            if(a + nip <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nip);
 
            b = b / a;
            b = TMath::Exp(b);
            sp = sp + b;
            if(i - l + 1 < ymin)
               a = working_space[xmin][ymin][zmin + 2 * sizez_ext] / maxch;
 
            else
               a = working_space[xmin][i - l + 1][zmin + 2 * sizez_ext] / maxch;
 
            b = a - nim;
            if(a + nim <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nim);
 
            b = b / a;
            b = TMath::Exp(b);
            sm = sm + b;
         }
         a = sp / sm;
         a = working_space[xmin][i + 1][zmin] = a * working_space[xmin][i][zmin];
         nom = nom + a;
      }
      for(i = zmin;i < zmax;i++){
         nip = working_space[xmin][ymin][i + 2 * sizez_ext] / maxch;
         nim = working_space[xmin][ymin][i + 1 + 2 * sizez_ext] / maxch;
         sp = 0,sm = 0;
         for(l = 1;l <= averWindow;l++){
            if((i + l) > zmax)
               a = working_space[xmin][ymin][zmax + 2 * sizez_ext] / maxch;
 
            else
               a = working_space[xmin][ymin][i + l + 2 * sizez_ext] / maxch;
 
            b = a - nip;
            if(a + nip <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nip);
 
            b = b / a;
            b = TMath::Exp(b);
            sp = sp + b;
            if(i - l + 1 < zmin)
               a = working_space[xmin][ymin][zmin + 2 * sizez_ext] / maxch;
 
            else
               a = working_space[xmin][ymin][i - l + 1 + 2 * sizez_ext] / maxch;
 
            b = a - nim;
            if(a + nim <= 0)
               a = 1;
 
            else
               a = TMath::Sqrt(a + nim);
 
            b = b / a;
            b = TMath::Exp(b);
            sm = sm + b;
         }
         a = sp / sm;
         a = working_space[xmin][ymin][i + 1] = a * working_space[xmin][ymin][i];
         nom = nom + a;
      }
      for(i = xmin;i < xmax; i++){
         for(j = ymin;j < ymax; j++){
            nip = working_space[i][j + 1][zmin + 2 * sizez_ext] / maxch;
            nim = working_space[i + 1][j + 1][zmin + 2 * sizez_ext] / maxch;
            spx = 0,smx = 0;
            for(l = 1;l <= averWindow; l++){
               if(i + l > xmax)
                 a = working_space[xmax][j][zmin + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i + l][j][zmin + 2 * sizez_ext] / maxch;
 
               b = a - nip;
               if(a + nip <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nip);
 
               b = b / a;
               b = TMath::Exp(b);
               spx = spx + b;
               if(i - l + 1 < xmin)
                  a = working_space[xmin][j][zmin + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i - l + 1][j][zmin + 2 * sizez_ext] / maxch;
 
               b = a - nim;
               if(a + nim <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nim);
 
               b = b / a;
               b = TMath::Exp(b);
               smx = smx + b;
            }
            spy = 0,smy = 0;
            nip = working_space[i + 1][j][zmin + 2 * sizez_ext] / maxch;
            nim = working_space[i + 1][j + 1][zmin + 2 * sizez_ext] / maxch;
            for(l = 1;l <= averWindow; l++){
               if(j + l > ymax)
                  a = working_space[i][ymax][zmin + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i][j + l][zmin + 2 * sizez_ext] / maxch;
 
               b = a - nip;
               if(a + nip <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nip);
 
               b = b / a;
               b = TMath::Exp(b);
               spy = spy + b;
               if(j - l + 1 < ymin)
                  a = working_space[i][ymin][zmin + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i][j - l + 1][zmin + 2 * sizez_ext] / maxch;
 
               b = a - nim;
               if(a + nim <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nim);
 
               b = b / a;
               b = TMath::Exp(b);
               smy = smy + b;
            }
            a = (spx * working_space[i][j + 1][zmin] + spy * working_space[i + 1][j][zmin]) / (smx + smy);
            working_space[i + 1][j + 1][zmin] = a;
            nom = nom + a;
         }
      }
      for(i = xmin;i < xmax;i++){
         for(j = zmin;j < zmax;j++){
            nip = working_space[i][ymin][j + 1 + 2 * sizez_ext] / maxch;
            nim = working_space[i + 1][ymin][j + 1 + 2 * sizez_ext] / maxch;
            spx = 0,smx = 0;
            for(l = 1;l <= averWindow; l++){
               if(i + l > xmax)
                  a = working_space[xmax][ymin][j + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i + l][ymin][j + 2 * sizez_ext] / maxch;
 
               b = a - nip;
               if(a + nip <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nip);
 
               b = b / a;
               b = TMath::Exp(b);
               spx = spx + b;
               if(i - l + 1 < xmin)
                  a = working_space[xmin][ymin][j + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i - l + 1][ymin][j + 2 * sizez_ext] / maxch;
 
               b = a - nim;
               if(a + nim <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nim);
 
               b = b / a;
               b = TMath::Exp(b);
               smx = smx + b;
            }
            spz = 0,smz = 0;
            nip = working_space[i + 1][ymin][j + 2 * sizez_ext] / maxch;
            nim = working_space[i + 1][ymin][j + 1 + 2 * sizez_ext] / maxch;
            for(l = 1;l <= averWindow; l++){
               if(j + l > zmax)
                  a = working_space[i][ymin][zmax + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i][ymin][j + l + 2 * sizez_ext] / maxch;
 
               b = a - nip;
               if(a + nip <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nip);
 
               b = b / a;
               b = TMath::Exp(b);
               spz = spz + b;
               if(j - l + 1 < zmin)
                  a = working_space[i][ymin][zmin + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[i][ymin][j - l + 1 + 2 * sizez_ext] / maxch;
 
               b = a - nim;
               if(a + nim <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nim);
 
               b = b / a;
               b = TMath::Exp(b);
               smz = smz + b;
            }
            a = (spx * working_space[i][ymin][j + 1] + spz * working_space[i + 1][ymin][j]) / (smx + smz);
            working_space[i + 1][ymin][j + 1] = a;
            nom = nom + a;
         }
      }
      for(i = ymin;i < ymax;i++){
         for(j = zmin;j < zmax;j++){
            nip = working_space[xmin][i][j + 1 + 2 * sizez_ext] / maxch;
            nim = working_space[xmin][i + 1][j + 1 + 2 * sizez_ext] / maxch;
            spy = 0,smy = 0;
            for(l = 1;l <= averWindow; l++){
               if(i + l > ymax)
                  a = working_space[xmin][ymax][j + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[xmin][i + l][j + 2 * sizez_ext] / maxch;
 
               b = a - nip;
               if(a + nip <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nip);
 
               b = b / a;
               b = TMath::Exp(b);
               spy = spy + b;
               if(i - l + 1 < ymin)
                  a = working_space[xmin][ymin][j + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[xmin][i - l + 1][j + 2 * sizez_ext] / maxch;
 
               b = a - nim;
               if(a + nim <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nim);
 
               b = b / a;
               b = TMath::Exp(b);
               smy = smy + b;
            }
            spz = 0,smz = 0;
            nip = working_space[xmin][i + 1][j + 2 * sizez_ext] / maxch;
            nim = working_space[xmin][i + 1][j + 1 + 2 * sizez_ext] / maxch;
            for(l = 1;l <= averWindow; l++){
               if(j + l > zmax)
                  a = working_space[xmin][i][zmax + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[xmin][i][j + l + 2 * sizez_ext] / maxch;
 
               b = a - nip;
               if(a + nip <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nip);
 
               b = b / a;
               b = TMath::Exp(b);
               spz = spz + b;
               if(j - l + 1 < zmin)
                  a = working_space[xmin][i][zmin + 2 * sizez_ext] / maxch;
 
               else
                  a = working_space[xmin][i][j - l + 1 + 2 * sizez_ext] / maxch;
 
               b = a - nim;
               if(a + nim <= 0)
                  a = 1;
 
               else
                  a = TMath::Sqrt(a + nim);
 
               b = b / a;
               b = TMath::Exp(b);
               smz = smz + b;
            }
            a = (spy * working_space[xmin][i][j + 1] + spz * working_space[xmin][i + 1][j]) / (smy + smz);
            working_space[xmin][i + 1][j + 1] = a;
            nom = nom + a;
         }
      }
      for(i = xmin;i < xmax; i++){
         for(j = ymin;j < ymax; j++){
            for(k = zmin;k < zmax; k++){
               nip = working_space[i][j + 1][k + 1 + 2 * sizez_ext] / maxch;
               nim = working_space[i + 1][j + 1][k + 1 + 2 * sizez_ext] / maxch;
               spx = 0,smx = 0;
               for(l = 1;l <= averWindow; l++){
                  if(i + l > xmax)
                     a = working_space[xmax][j][k + 2 * sizez_ext] / maxch;
 
                  else
                     a = working_space[i + l][j][k + 2 * sizez_ext] / maxch;
 
                  b = a - nip;
                  if(a + nip <= 0)
                     a = 1;
 
                  else
                     a = TMath::Sqrt(a + nip);
 
                  b = b / a;
                  b = TMath::Exp(b);
                  spx = spx + b;
                  if(i - l + 1 < xmin)
                     a = working_space[xmin][j][k + 2 * sizez_ext] / maxch;
 
                  else
                     a = working_space[i - l + 1][j][k + 2 * sizez_ext] / maxch;
 
                  b = a - nim;
                  if(a + nim <= 0)
                     a = 1;
 
                  else
                     a = TMath::Sqrt(a + nim);
 
                  b = b / a;
                  b = TMath::Exp(b);
                  smx = smx + b;
               }
               spy = 0,smy = 0;
               nip = working_space[i + 1][j][k + 1 + 2 * sizez_ext] / maxch;
               nim = working_space[i + 1][j + 1][k + 1 + 2 * sizez_ext] / maxch;
               for(l = 1;l <= averWindow; l++){
                  if(j + l > ymax)
                     a = working_space[i][ymax][k + 2 * sizez_ext] / maxch;
 
                  else
                     a = working_space[i][j + l][k + 2 * sizez_ext] / maxch;
 
                  b = a - nip;
                  if(a + nip <= 0)
                     a = 1;
 
                  else
                     a = TMath::Sqrt(a + nip);
 
                  b = b / a;
                  b = TMath::Exp(b);
                  spy = spy + b;
                  if(j - l + 1 < ymin)
                     a = working_space[i][ymin][k + 2 * sizez_ext] / maxch;
 
                  else
                     a = working_space[i][j - l + 1][k + 2 * sizez_ext] / maxch;
 
                  b = a - nim;
                  if(a + nim <= 0)
                     a = 1;
 
                  else
                     a = TMath::Sqrt(a + nim);
 
                  b = b / a;
                  b = TMath::Exp(b);
                  smy = smy + b;
               }
               spz = 0,smz = 0;
               nip = working_space[i + 1][j + 1][k + 2 * sizez_ext] / maxch;
               nim = working_space[i + 1][j + 1][k + 1 + 2 * sizez_ext] / maxch;
               for(l = 1;l <= averWindow; l++ ){
                  if(j + l > zmax)
                     a = working_space[i][j][zmax + 2 * sizez_ext] / maxch;
 
                  else
                     a = working_space[i][j][k + l + 2 * sizez_ext] / maxch;
 
                  b = a - nip;
                  if(a + nip <= 0)
                     a = 1;
 
                  else
                     a = TMath::Sqrt(a + nip);
 
                  b = b / a;
                  b = TMath::Exp(b);
                  spz = spz + b;
                  if(j - l + 1 < ymin)
                     a = working_space[i][j][zmin + 2 * sizez_ext] / maxch;
 
                  else
                     a = working_space[i][j][k - l + 1 + 2 * sizez_ext] / maxch;
 
                  b = a - nim;
                  if(a + nim <= 0)
                     a = 1;
 
                  else
                     a = TMath::Sqrt(a + nim);
 
                  b = b / a;
                  b = TMath::Exp(b);
                  smz = smz + b;
               }
               a = (spx * working_space[i][j + 1][k + 1] + spy * working_space[i + 1][j][k + 1] + spz * working_space[i + 1][j + 1][k]) / (smx + smy + smz);
               working_space[i + 1][j + 1][k + 1] = a;
               nom = nom + a;
            }
         }
      }
      a = 0;
      for(i = xmin;i <= xmax; i++){
         for(j = ymin;j <= ymax; j++){
            for(k = zmin;k <= zmax; k++){
               working_space[i][j][k] = working_space[i][j][k] / nom;
               a+=working_space[i][j][k];
            }
         }
      }
      for(i = 0;i < sizex_ext; i++){
         for(j = 0;j < sizey_ext; j++){
            for(k = 0;k < sizez_ext; k++){
               working_space[i][j][k + 2 * sizez_ext] = working_space[i][j][k] * plocha_markov / a;
            }
         }
      }
   }
 
   maximum = 0;
   for(k = 0;k < ssizez; k++){
      for(j = 0;j < ssizey; j++){
         for(i = 0;i < ssizex; i++){
            working_space[i][j][k] = 0;
            working_space[i][j][sizez_ext + k] = 0;
            if(working_space[i][j][k + 3 * sizez_ext] > maximum)
               maximum=working_space[i][j][k+3*sizez_ext];
         }
      }
   }
   for(i = 0;i < PEAK_WINDOW; i++){
      c[i] = 0;
   }
   j = (Int_t)(pocet_sigma * sigma + 0.5);
   for(i = -j;i <= j; i++){
      a=i;
      a = -a * a;
      b = 2.0 * sigma * sigma;
      a = a / b;
      a = TMath::Exp(a);
      s = i;
      s = s * s;
      s = s - sigma * sigma;
      s = s / (sigma * sigma * sigma * sigma);
      s = s * a;
      c[PEAK_WINDOW / 2 + i] = s;
   }
   norma = 0;
   for(i = 0;i < PEAK_WINDOW; i++){
      norma = norma + TMath::Abs(c[i]);
   }
   for(i = 0;i < PEAK_WINDOW; i++){
      c[i] = c[i] / norma;
   }
   a = pocet_sigma * sigma + 0.5;
   i = (Int_t)a;
   zmin = i;
   zmax = sizez_ext - i - 1;
   ymin = i;
   ymax = sizey_ext - i - 1;
   xmin = i;
   xmax = sizex_ext - i - 1;
   lmin = PEAK_WINDOW / 2 - i;
   lmax = PEAK_WINDOW / 2 + i;
   for(i = xmin;i <= xmax; i++){
      for(j = ymin;j <= ymax; j++){
         for(k = zmin;k <= zmax; k++){
            s = 0,f = 0;
            for(li = lmin;li <= lmax; li++){
               for(lj = lmin;lj <= lmax; lj++){
                  for(lk = lmin;lk <= lmax; lk++){
                     a = working_space[i + li - PEAK_WINDOW / 2][j + lj - PEAK_WINDOW / 2][k + lk - PEAK_WINDOW / 2 + 2 * sizez_ext];
                     b = c[li] * c[lj] * c[lk];
                     s += a * b;
                     f += a * b * b;
                  }
               }
            }
            working_space[i][j][k] = s;
            working_space[i][j][k + sizez_ext] = TMath::Sqrt(f);
         }
      }
   }
   for(x = xmin;x <= xmax; x++){
      for(y = ymin + 1;y < ymax; y++){
         for(z = zmin + 1;z < zmax; z++){
            val = working_space[x][y][z];
            val1 =  working_space[x - 1][y - 1][z - 1];
            val2 =  working_space[x    ][y - 1][z - 1];
            val3 =  working_space[x + 1][y - 1][z - 1];
            val4 =  working_space[x - 1][y    ][z - 1];
            val5 =  working_space[x    ][y    ][z - 1];
            val6 =  working_space[x + 1][y    ][z - 1];
            val7 =  working_space[x - 1][y + 1][z - 1];
            val8 =  working_space[x    ][y + 1][z - 1];
            val9 =  working_space[x + 1][y + 1][z - 1];
            val10 = working_space[x - 1][y - 1][z    ];
            val11 = working_space[x    ][y - 1][z    ];
            val12 = working_space[x + 1][y - 1][z    ];
            val13 = working_space[x - 1][y    ][z    ];
            val14 = working_space[x + 1][y    ][z    ];
            val15 = working_space[x - 1][y + 1][z    ];
            val16 = working_space[x    ][y + 1][z    ];
            val17 = working_space[x + 1][y + 1][z    ];
            val18 = working_space[x - 1][y - 1][z + 1];
            val19 = working_space[x    ][y - 1][z + 1];
            val20 = working_space[x + 1][y - 1][z + 1];
            val21 = working_space[x - 1][y    ][z + 1];
            val22 = working_space[x    ][y    ][z + 1];
            val23 = working_space[x + 1][y    ][z + 1];
            val24 = working_space[x - 1][y + 1][z + 1];
            val25 = working_space[x    ][y + 1][z + 1];
            val26 = working_space[x + 1][y + 1][z + 1];
            f = -s_f_ratio_peaks * working_space[x][y][z + sizez_ext];
            if(val < f && val < val1 && val < val2 && val < val3 && val < val4 && val < val5 && val < val6 && val < val7 && val < val8 && val < val9 && val < val10 && val < val11 && val < val12 && val < val13 && val < val14 && val < val15 && val < val16 && val < val17 && val < val18 && val < val19 && val < val20 && val < val21 && val < val22 && val < val23 && val < val24 && val < val25 && val < val26){
               s=0,f=0;
            for(li = lmin;li <= lmax; li++){
               a = working_space[x + li - PEAK_WINDOW / 2][y][z + 2 * sizez_ext];
               s += a * c[li];
               f += a * c[li] * c[li];
            }
            f = -s_f_ratio_peaks * sqrt(f);
            if(s < f){
               s = 0,f = 0;
               for(li = lmin;li <= lmax; li++){
                  a = working_space[x][y + li - PEAK_WINDOW / 2][z + 2 * sizez_ext];
                  s += a * c[li];
                  f += a * c[li] * c[li];
               }
               f = -s_f_ratio_peaks * sqrt(f);
               if(s < f){
                  s = 0,f = 0;
                  for(li = lmin;li <= lmax; li++){
                     a = working_space[x][y][z + li - PEAK_WINDOW / 2 + 2 * sizez_ext];
                     s += a * c[li];
                     f += a * c[li] * c[li];
                  }
                  f = -s_f_ratio_peaks * sqrt(f);
                  if(s < f){
                     s = 0,f = 0;
                     for(li = lmin;li <= lmax; li++){
                        for(lj = lmin;lj <= lmax; lj++){
                           a = working_space[x + li - PEAK_WINDOW / 2][y + lj - PEAK_WINDOW / 2][z + 2 * sizez_ext];
                           s += a * c[li] * c[lj];
                           f += a * c[li] * c[li] * c[lj] * c[lj];
                        }
                     }
                     f = s_f_ratio_peaks * sqrt(f);
                     if(s > f){
                        s = 0,f = 0;
                        for(li = lmin;li <= lmax; li++){
                           for(lj = lmin;lj <= lmax; lj++){
                              a = working_space[x + li - PEAK_WINDOW / 2][y][z + lj - PEAK_WINDOW / 2 + 2 * sizez_ext];
                              s += a * c[li] * c[lj];
                              f += a * c[li] * c[li] * c[lj] * c[lj];
                           }
                        }
                        f = s_f_ratio_peaks * sqrt(f);
                        if(s > f){
                           s = 0,f = 0;
                           for(li = lmin;li <= lmax; li++){
                              for(lj=lmin;lj<=lmax;lj++){
                                 a = working_space[x][y + li - PEAK_WINDOW / 2][z + lj - PEAK_WINDOW / 2 + 2 * sizez_ext];
                                 s += a * c[li] * c[lj];
                                 f += a * c[li] * c[li] * c[lj] * c[lj];
                              }
                           }
                           f = s_f_ratio_peaks * sqrt(f);
                              if(s > f){
                                 if(x >= shift && x < ssizex + shift && y >= shift && y < ssizey + shift && z >= shift && z < ssizez + shift){
                                    if(working_space[x][y][z + 3 * sizez_ext] > threshold * maximum / 100.0){
                                       if(peak_index<fMaxPeaks){
                                          for(k = x - 1,a = 0,b = 0;k <= x + 1; k++){
                                             a += (Double_t)(k - shift) * working_space[k][y][z];
                                             b += working_space[k][y][z];
                                          }
                                          fPositionX[peak_index] = a / b;
                                          for(k = y - 1,a = 0,b = 0;k <= y + 1; k++){
                                             a += (Double_t)(k - shift) * working_space[x][k][z];
                                             b += working_space[x][k][z];
                                          }
                                          fPositionY[peak_index] = a / b;
                                          for(k = z - 1,a = 0,b = 0;k <= z + 1; k++){
                                             a += (Double_t)(k - shift) * working_space[x][y][k];
                                             b += working_space[x][y][k];
                                          }
                                          fPositionZ[peak_index] = a / b;
                                          peak_index += 1;
                                       }
                                    }
                                 }
                              }
                           }
                        }
                     }
                  }
               }
            }
         }
      }
   }
   for(i = 0;i < ssizex; i++){
      for(j = 0;j < ssizey; j++){
         for(k = 0;k < ssizez; k++){
            val = -working_space[i + shift][j + shift][k + shift];
            if( val < 0)
               val = 0;
            dest[i][j][k] = val;
         }
      }
   }
   k = (Int_t)(4 * sigma + 0.5);
   k = 4 * k;
   for(i = 0;i < ssizex + k; i++){
      for(j = 0;j < ssizey + k; j++)
         delete[] working_space[i][j];
      delete[] working_space[i];
   }
   delete[] working_space;
   fNPeaks = peak_index;
   return fNPeaks;
}
 
////////////////////////////////////////////////////////////////////////////////
/// static function (called by TH3), interface to TSpectrum3::Background
 
TH1 *TSpectrum3::StaticBackground(const TH1 *hist, Int_t nIterX, Int_t nIterY, Int_t nIterZ, Option_t *option)
{
   TSpectrum3 s;
   return s.Background(hist, nIterX, nIterY, nIterZ, option);
}