Am Mittwoch, 27. April 2016, 18:18:38 schrieb Elle Stone: > On 04/27/2016 05:11 PM, Tobias Ellinghaus wrote: > > Am Mittwoch, 27. April 2016, 10:55:14 schrieb Elle Stone: > >> The darktable plug-in linear Rec 709 chromaticities don't match the GIMP > >> built-in sRGB chromaticities. > > > > Thanks for bringing that up, I changed the sRGB profile a while ago but > > somehow forgot the others. I pushed a change to create profiles that > > match your sample set. Could you please have a look at them ? > > > >  https://houz.org/tmp/darktable_profiles_2.0.4.tgz > > Using iccToXml to check the colorants and chad, the colorants and chad > are perfect for all four profiles.
Good, thanks for checking. > The darktable sRGB profile is a "V2 according to V4" profile with a > point TRC. So this profile clips out of gamut channel values in floating > point images. Yes, what would you suggest? Using a different encoding for the TRC? > GIMP's internal sRGB profile is a V4 profile with a parametric TRC, so > GIMP's sRGB profile doesn't clip out of gamut channel values in floating > point images. So is darktable's internal sRGB profile (the one you can select in "input color profile"). We just export with a V2 to make it easy to actually look at the image. And I don't expect people to export float images in sRGB. > I don't know what the actual rationale is for darktable to make a V2 > version of sRGB. But at this point in time a V2 profile is the right > choice for output to the web, for maximum compatibility with the various > browsers (even Firefox doesn't read V4 profiles unless the user changes > the gfx settings in about.config). That. > Best, > Elle Tobias
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