Hi Luc, well, I guess I was not clear. An "image display" is a window you can send an image to. Normally images are read like this: ncolumns , nlines intensity[0][0] intensity[0][1] ... intensity[0][nlines] intensity[1][1] ... intensity[ncolumns][0] intensity[ncolumns][1] ... intensity[ncolumns][nlines] Once you read the image you can display it on a window with ncolumns x nlines pixels. The intensities are represented by the brightness of the pixel, white being bright and black dark. Usually you can change the translation intensity-to-graylevel normally by moving a slide button which changes what is called the lookup table. Actually there normally are two slide buttons just like in a tv set: brightness and contrast. Then you can have other programs which interact with that to extract specific quantitative information in an interactive fashion. that's basically what I am trying to find on root, hope it is there. thanks for your question I hope this makes things more clear now. Antonio >>>>> "Perrot" == Perrot Luc <perrot@isn.in2p3.fr> writes: Perrot> Antonio Kanaan wrote: >> Hi All, >> >> I am transferring some of my astronomical programming to root. >> One basic need of an Astronomer is an image display tool which >> I am not sure there is one in root. The closest to it I found >> is in the ntuple1.C tutorial used in the fourth pad, but it is >> still far from what I really need. Is there something closer >> to displaying an image than that? Any hints appreciated. >> >> Thanks, >> >> Antonio >> >> *************************************************************** >> Antônio Kanaan Departamento de Física - Universidade Federal de >> Santa Catarina CP 476 -- CEP 88040-900 -- Florianópolis -- SC >> -- Brasil http://www.astro.ufsc.br/~kanaan e-mail: >> kanaan@astro.ufsc.br Phone: 55,48,3319069 FAX : 55,48,3319946 Perrot> Hi, I'am very sorry but i don't see very well what Perrot> you want for your display, have you been an example ? Luc Perrot> --------------------------------------------- Luc Perrot Perrot> Etudiant doctorant (PhD) Groupe Reacteurs Hybrides 53 Perrot> Avenue des Martyrs 38026 Grenoble Cedex France tel : 04 76 Perrot> 28 40 93 ---------------------------------------------
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