Richard,
It's not a bug. The image profile does actually change the data that
you're working with, so you will get another histogram. If you've just
calibrated your monitor, did you restart your shell? Darktable will use
the system settings for output profile. I set everything to Adobe, because
I record all my images in an Adobe colour profile because it has more
colour depth.
Anyone reading this who knows better, please correct me if I'm wrong. I've
made a lot of assumptions above, but it's the only thing that makes sense
to me.
Regards,
John P Santos
*Green Bee Media* - Digital Media Consultant
http://greenbeemedia.com
+1 (416) 854-3089
On Sat, Feb 2, 2013 at 4:14 PM, Richard Levitte <[email protected]> wrote:
> Hi,
>
> for a moment, I thought I had found a HUGE bug in darktable. You see,
> I had just calibrated my screen (wow, grey really looks grey now!),
> and was surprised to see that darktable suddenly gave me very
> different results in development mode. The histogram looked awfully
> wrong, the left end of the green channel would for example never move
> left, it stopped a bit in from the left of the histogram, and colors
> were all weird.
>
> It took me a moment to notice the display profile choice in the output
> color profile module. Changing it to something like sRGB made things
> quite a bit better.
>
> Something I noticed was that the change of display profile changed the
> image histogram... and that has me surprised. Why should the display
> profile affect the image histogram? I can understand if output and
> softproof profiles affect the histogram... but *display*?
> Truly, this looks like a bug to me... however, not as huge as I first
> thought, but still a usability bug. It makes me distrust the
> histogram.
>
> Cheers,
> Richard
>
> --
> Richard Levitte [email protected]
> http://richard.levitte.org/
>
> "Life is a tremendous celebration - and I'm invited!"
> -- from a friend's blog, translated from Swedish
>
>
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