[argyllcms] Re: Custom Illuminant

  • From: Graeme Gill <graeme@xxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Thu, 10 Jul 2014 12:10:07 +1000

robert@xxxxxxxxxxxxxxxxxx wrote:

> The reason I'm thinking of a 2-step process is that:
> - Step 1: ProPhoto-to-AdobeRGB is a relative conversion that will only clip
> OOG colors.
> - Step 2: The Perceptual AdobeRGB-to-Print mapping should have a lesser
> flattening/desaturating effect than would a direct Perceptual
> ProPhoto-to-Print mapping (since the AdobeRGB space is smaller than the
> ProPhoto RGB space).

Right, if you use the default of assuming that the images occupy
their encoding space.

> Reducing the Print gamut by using colprof -g won't improve the ProPhoto to
> Print desaturation ... it will only make it worse (I think).

It shouldn't. You should be able to do the AdobeRGB to output gamut
mapping with the input images encoded in ProPhoto space. That's
what -g is for.

Graeme Gill.

Other related posts: