Re: [Gimp-developer] The darktable plug-in isn't using the user-specified output ICC profile

Am Mittwoch, 27. April 2016, 12:00:32 schrieb Elle Stone:
On 04/24/2016 12:30 PM, Tobias Ellinghaus wrote:
It's hardcoded to export 32bit float EXR
as linear Rec709 after opening up your regular darktable. Did you
select the Canon or Nikon format in the open dialog?

It would be nice if the darktable plug-in were modified to allow users
to choose their preferred output space.


But currently darktable does seem to force output to be in the darktable
version of linear gamma Rec709 (which isn't equivalent to GIMP's
internal linear gamma sRGB color space -
-, but hopefully this can be changed).

Should be fixed, see the other thread. Once you confirmed that the profiles are 
fine now we will release darktable 2.0.4.

Right now GIMP is an "sRGB only" image editor. But this situation surely
won't last forever. Having a raw processing plug-in that only allows to
export in one color space (especially a color space that doesn't match
the GIMP built-in sRGB color space) seems to be a step in the wrong

The reason I chose linear sRGB is that

1) we are exporting to EXR as the intermediate file, so we need a linear profile
2) GIMP seems to work best with sRGB images so far, so I used the linear 
version of that.

I agree that it would be nice to have some choice there. Would default export 
to linear Rec2020 be better? Still hard coded, but a wider gamut. It seems 
GIMP asks about converting the colors anyway, so for people that want to work 
in sRGB that's just one click away.

Having a way to actually change the profile from darktable on the fly would 
require some changed to darktable that I don't want to do right now (pending 
release, breaking things, you know the drill). Eventually I will think about 
ways to fix that though.

Also, only some GIMP operations are "sRGB only". Many operations work
just fine using any RGB working space chromaticities.

Presumably at least some GIMP users will sometimes want to edit their
interpolated raw files in RGB working spaces other than sRGB, and GIMP
does allow this to happen. So it doesn't make sense that the darktable
plug-in prevents users from exporting the image in the user's chosen RGB
working space.



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