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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