Hi Gerhard, It's a bug. Fixed in CVS.
It was caused from a new feature introduced in 1.14. Some printer profiles are broken in a way Lab of (100, 0, 0) does not map exactly to unprinter paper. This is because the encoding of PCS makes extremly difficult to map white into an exact node, so, this was causing scum dot. lcms 1.14 fixes that by forcing exact white to white on all but absolute colorimetric intent, no matter what profile says. Obviously, I forgot to add a check for softproofing, where this fix shouldn't be applied at all. Thanks for the report. Regards. Marti Maria The little cms project http://www.littlecms.com ----- Original Message ----- From: "Gerhard Fuernkranz" <[EMAIL PROTECTED]> To: "Marti Maria" <[EMAIL PROTECTED]>; "Lcms-User" <[EMAIL PROTECTED]> Sent: Friday, November 26, 2004 8:49 PM Subject: [Lcms-user] tifficc -p ... Hi Marti, I think I encountered a problem with "tifficc -p ...". Shouldn't tifficc -v -c2 -t0 -o lcd.icc -m3 -p printer.icc test.tif proof.tif give the same result as tifficc -v -c2 -t0 -o printer.icc test.tif tmp.tif tifficc -v -c2 -t3 -i printer.icc -o lcd.icc tmp.tif proof.tif ? Baisically, the resulting images are nearly identical (+/- 1 RGB count), for all colors I have checked, EXCEPT FOR WHITE. The former command renders white (sRGB=[255,255,255] in the source image) as [255,255,255], while the latter two commands result in [233,223,236]. For an ICC-absolute proofing intent, acutally the latter seems to be correct (blue-ish paper white with circa 80% reflectance). Any idea? Thanks, Gerhard ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ Lcms-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/lcms-user ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ Lcms-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/lcms-user
