Hi,

Would please give a try to the precompiled icc2ps.exe located here?

http://www.littlecms.com/icc2ps.exe


I've done some fixing in the CSA generation logic, and found some bugs. 
Additionally, this also has black point compensation feature for CRD. 
If this works fine to you, I will commit the chages to main sources, 
and do a new release or a patch to 1.11.

Thanks.

Regards,
Marti Maria.


----- Original Message ----- 
From: "Reinhard Roesel" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, November 10, 2003 5:33 PM
Subject: [Lcms-user] Problem with white using any lcms-generated CMYK-CSA


Hallo,

thanx to the developers for the good work on lcms !

I'm playing with it for generation of CSAs and CRDs for a
PS-RIP for a laser color copier/printer, which works fine,
except from the reproduction of white when simulating
another CMYK colorspace via
<< /UseCIEColor true >> setpagedevice
and remapping DeviceCMYK via a generated CSA.

All colors look fine, but white does not remain white
(regardless of rendering intent and CRD and originating
Profile for CSA), it is always a bit dirty.

Printing RGB images using an RGB-Profile -> CSA works fine,
white remains white.
The same CMYK-workflow in Photoshop 7 works too, only the
in-rip conversion with the CSA fails.

I don't have the deep background in color conversion mathematics
and its implementation in PostSctipt (not yet, but I'm still
hopeful...)

So my question: Can I modify the originating profile
or the CSA (or the generating code) to get a clear white in
the simulation ? Or is it a bug in lcms ?

It looks like the problem mentioned in this posting:
http://sourceforge.net/mailarchive/forum.php?thread_id=2922755&forum_id=1912

If it is and will remain a bug - is there another (free or
non-free) library for creating CSAs on Windows or Linux ?

Thank you a lot !


Regards

Reinhard

-- 
Reinhard Roesel
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Sofha GmbH           D-13355 Berlin        Gustav-Meyer-Allee 25
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