Hi Larry,
The actual K-preservation implementation is just a
first try. I am pretty sure there is a lot of room for
improvement. So, I would be happy to know of
cases where the actual algorithm does NOT work,
specifically, if you can send me the involved profiles
I would be very gratefull.
Regards
Marti Maria
The littleCMS project
http://www.littlecms.com
----- Original Message -----
From: Larry Tseng
To: lcms-user@lists.sourceforge.net
Sent: Thursday, March 09, 2006 2:25 AM
Subject: [Lcms-user] Black preservation
Hello list,
I find the preserve black feature to be very helpful in cmyk to cmyk
conversions when k-only images, text and graphics should remain k-only after
the conversion. Lcms does this nicely, and with proper k-only tone
compensation as well. Unfortunately, "colorful" cmyk text and images can
experience large color shifts, enough to render the feature unusable, and
very problematic in situations where both k-only and colorful cmyk material
are both present in the source.
I am wondering whether the idea of "clean-blacks", as implemented in
devicelink profiles created by ColorThink Pro, Link-o-lator, and
GretagMacBeth, isn't the better way to go. Here, cmyk converts in the usual
way except for the special case of k, where c=m=y=0%, which is subjected to
a k-only to k-only transform.
Regards,
Larry Tseng
-------------------------------------------------------
This SF.Net email is sponsored by xPML, a groundbreaking scripting language
that extends applications into web and mobile media. Attend the live webcast
and join the prime developer group breaking into this new coding territory!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642
_______________________________________________
Lcms-user mailing list
Lcms-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/lcms-user
