Re: [Lcms-user] Bug in soft proofing?

[Wolthera <gri...@gm...>]

I wanted to add to this that I previously did mail about this issue in
Krita, but then Real Life happened, and I was unable to answer. So I
am going to outline the color management er... 'pipeline' within
Krita(Cannot speak for GIMP and Scribus).

Say we have a situation where we have an Image profile, a CMYK profile
and a Display profile. When we're using conversion (which gives the
correct result), we're going from

Image profile -> Display Profile

Where the rendering intent and blackpoint compensation is configurable
by the user. The user then converts, where they too can configure the
rendering intent and BPC, leading to.

Image Profile -> CMYK Profile.
CMYK Profile(The new image profile) -> Display Profile.

Now for softproofing, we have the following:

Image Profile -> CMYK Profile -> Display Profile.

The rendering intent and bpc is the same for both transforms(and
configured by the user), which may not be strictly correct. However,
even when we set up the configuration so that the conversion pipeline
and the softproofing pipeline use the exact same configuration, the
softproofing result looks faded compared to the conversion result.

I hope this helps figuring out what is going on.

-- 
Wolthera