On Sun, Apr 7, 2013 at 10:32 PM, Markus <[email protected]> wrote:
>
> I'm using Ubuntu 12.10 with the latest updates.
>
> Pictures with no dark areas look ok. If there are dark areas, then they
> are much brighter than in the camera processed jpgs.
>
> If I enable the Zone System plugin with blend:multiplication the dark
> areas are looking like in the processed jpg.
>
Not relevant...
> I'm working on a HP laptop with proprietary AMD display driver installed.
> Sometimes I have an external monitor attached to it.
>
> The output of
>
> xprop -display :0.0 -len 14 -root _ICC_PROFILE
>
> is _ICC_PROFILE(CARDINAL) = 0, 0, 4, 140, 108, 99, 109, 115, 4, 32, 0, 0,
> 109, 110.
>
> Tested it with no external display attached.
>
> So you have a display profile active, which darktable is applying (as it
should), but Shotwell probably isn't...
Since it's a _display_ profile, this change is only applied for _display_
so the actual image data is similar.
Now, current versions of GNOME Color Manager don't allow for disabling this
behavior... A potential workaround would be to load an srgb.icc file as
display profile.
http://files.pcode.nl/icc/srgb.icc
But, please do actually read my earlier like, to get what this is all
about...
Regards,
Pascal de Bruijn
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