On Fri, Mar 29, 2013 at 7:12 PM, Tobias Ellinghaus <[email protected]> wrote:
> Am Freitag, 29. März 2013, 19:09:00 schrub Alexander Wagner:
> > Hi!
>
> Hello.
>
> > It seems that I do not understand some detail of the colour profile
> > handling in Darktable correctly. Probably, someone could give me a
> > helping hand here.
>
> I will try. :)
>
> [...]
>
> > $ ln -s $HOME/.color/.icc $HOME/.config/darktable/color/in
>
> This one isn't needed.
>
> [...]
>
> > Finally, I loaded the icc-profile from Gnome colour manager and added it
> > as default for my monitor. To my understanding all colour aware
> > applications should now use this profile for rendering whatever input to
> > my monitor.
>
> Well, only very few applications are able to get the profile from colord,
> it
> might be a bit better with the alternative way, the x atom. But that's a
> technical detail we can ignore for now.
>
Particularly if one is using GNOME it makes very little sense to manage
this all manually...
If you use GNOME Color Manager to calibrate your display, pretty much
everything should just automagically work...
> > All looks pretty well till here.
> >
> > Now I open Darktable with it's default settings. (Empty library.db etc.)
> > If I understand it correctly, it should now ask colord for the profile
> > to use and use it for the display itself, right?
>
> Yes.
>
Operating via colord does not require the links in
~/.config/darktable/color though...
> > So, if this is correct, I wonder why the colour rendering changes
> > significantly if I expicitly switch /output color profile/ to /A.icc/
> > instead of /system display profile/ (which is set to be A.icc as well
> > via gnome colour manager and subsequently colord).
> >
> > IMHO this should give the same result as /system display profile/. But
> > actually what I get on screen seems to be sRGB regardless of what I set
> > for system colour profile.
> >
> > Could someone clarify my misunderstanding here?
>
> You should change the display profile, not the output profile. For output
> you
> probably want something like sRGB or AdobeRGB.
>
You may want to read up on this:
http://blog.pcode.nl/2012/01/29/color-management-on-linux/
Regards,
Pascal de Bruijn
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