[Lcms-user] 2 Linux profile packages

[Casper Boemann]

exactly what I have said all along :-)
but I guess that they don't have wetcolor profiles, so we need to think of
how to handle that.
What I say is: from rgb with lcms to xyz and from there with our own
conversion to wet
even better would be to create profiles for wet so we can go lcms all the
way

best regards / venlig hilsen
Casper Boemann
----- Original Message ----- 
From: "Boudewijn Rempt" <boud at valdyas.org>
To: <kimageshop at kde.org>
Sent: Monday, June 06, 2005 8:51 AM
Subject: Fwd: [Lcms-user] 2 Linux profile packages


I didn't do my homework yesterday, but the attached mail to the lcms list
shows that we should use lcms as much as possible for all our xyz/lab/srgb
conversion and profiling needs -- and we should include these profiles in
Krita as soon as we support xyz/lab.

We should lcms as much as possible, it gives us an accuracy that it would be
folly to try to reimplement ourselves. In particular, the transformation of
rgb (for instance, from a digital photo) to cmyk shouldn't be done through
some home-grown xyz function, but with lcms.

Same with painting on cmyk: an rgb color from a color selector should be
transformed using the lcms transform of (rgb + display profile) to (cmyk +
cmyk layer profile) -- we shouldn't try to do an intermediary transform
through xyz here. lcms can do out of gamut warning, by the way, making all
out-of-gamut colors a bilious green or orange. We should add this to the
toQImage routine in kis_colorspace_cmyk.

-- 
Boudewijn Rempt
http://www.valdyas.org/fading/index.cgi



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