Re: [Gimp-user] [Gimp-developer] Time to fork BABL and GEGL

[Elle Stone <ellestone ninedegreesbelow com>]

On 11/17/2014 06:56 PM, Simon Budig wrote:
> Oh, I was under the assumption that AdobeRGB had well defined
> chromaticies. If that is not the case then please consider my example
> moot. I am well aware that dealing with color profiles most definitely
> is not my area of expertise.
It absolutely does have well-defined chromaticities.

LCMS specifies an odd value for D65 and doesn't compensate for 
hexadecimal rounding. And so almost everyone who distributes ICC 
profiles made with LCMS makes AdobeRGB1998-compatible profiles that 
don't exactly match the Adobe specifications.

Graham Gill distributes ClayRGB1998.icm that exactly matches the Adobe 
specs. I've submitted code to GIMP to make a proper 
AdobeRGB1998-compatible profile.

Other free/libre profile makers really aren't distributing an exact 
match to the Adobe specs. I've already reported this on the LCMS mailing 
list.

Similar problems obtain with a lot of other free/libre ICC profiles.

Elle