Hi Denis,

Thank you very much for your fast reply.

I knew the improvement you've noticed in the last beta update. But it concerns new DSS images, when they are downloaded from internet. Mines, at least the ones I gave as examples, are old: they belong to CDs stuff, and have never been downloaded from internet.
Moreover the problem, that is to say the impossibility to adjust brightness/contrast of a single image, comes not from that image, but from its interferences with neaby other ones.
Hope these precisions will help you, and other Guide users, to focus on the problem.

Thanks again,

Bertrand

----- Original Message -----
From: Denis
To: guide-user@yahoogroups.com
Sent: Monday, July 25, 2005 10:55 PM
Subject: Re: [guide-user] Contrast of images


I believe that problem has been addressed in th upcoming update. The
beta version has fixed some of the problems. You could use the beta
version to temporally solve your problem.

Denis

Bertrand Laville wrote:
> Hi All,
>
> I need help concerning contrast of images.
> Some of DSS images are displayed on my screen totally blank or totally black, surely because I made a mistake at some moment.
> But I can't adjust the contrast of a given image without changing the one of nearby other images.
> Let me tell you an example.
> At level 5, that is a field of 10 degrees, I can see on the same screen images of IC 4756, blank, IC 4665, blank, and NGC 6653, with a normal contrast. If I click on a corner of each one, I can read the same data concerning contrast: "contrast 2550 to 12751"
> Then, If I click on display, and adjust the contrast / brightness of any of these images, the contrast / brightness of the three images vary accordingly. A consequence is that, if a decrease brightness up to obtain the two blank images with a normal brightness, the third one becomes totally black.
> In any way, I can only obtain a normal contrasted image and two blank ones, or, on the contrary, two normal contrasted images and a third totally black.
> Any idea on how modify contrast / brightness of an image without interfering with nearby ones ?
>
> Thanks in advance for your help.
> By the way, a friendly hello from french Alps mountains, where the weather is pretty good !
>
> Bertrand


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