On 03/29/2013 07:12 PM, Tobias Ellinghaus wrote:
Hi!
>> 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. :)
Thanks :)
> [...]
>
>> $ ln -s $HOME/.color/.icc $HOME/.config/darktable/color/in
>
> This one isn't needed.
I understood they would be used for switching the input profile. I just
placed the link as all profiles I have live in ~/.color/icc.
> [...]
>
>> 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.
Ok, THIS I'll definitely leave to you experts ;) I tried to say: "the
system knows which profile should be used for the monitor in question
and dt should get it from it."
>> 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.
>
>> 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.
Just a second. The darkroom module /output color profile/ is the only
way where I can set the profile dt is using for representation on screen
explicitly. Right? Besides I can set softproof and export profiles which
would affect the S and the export to whatever file respectively. So I
could use output e.g. to adopt for a given printer. Howerver, I didn't
change them (my lab expects sRGB, so I'm happy with the defaults here).
--
Kind regards, / War is Peace.
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Alexander Wagner | Ignorance is Strength.
|
| Theory : G. Orwell, "1984"
/ In practice: USA, since 2001
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