Hi, I have a strange issue when using absolute intent with tificc and jpgicc, which looks like a slightly too early clipping. As the results between tificc and jpgicc seem identical, I'll only talk about tificc.
Eg. if converting this image: http://hoech.net/files/lcms-chad-test/chad-test.tif with these sRGB profiles (one has a D50 whitepoint, the other D65): http://hoech.net/files/lcms-clipping/sRGB_profiles_D50_D65.zip Using tifficc: tificc -n -i "sRGB Color Space Profile (D50 Whitepoint).icc" -t3 -d0 -o "sRGB Color Space Profile.icm" -e "chad-test.tif" "tificc2.2.sRGB_D50_ICCv2.sRGB_D65_ICCv2.abscol.d0.0.tif" Then the red patch which had RGB=240 0 0 in the original image (2nd row, 2nd patch from the right) is RGB=255 0 0 in the resulting image: http://hoech.net/files/lcms-clipping/tificc2.2.sRGB_D50_ICCv2.sRGB_D65_ICCv2.abscol.d0.0.tif transicc tells another value which I think is correct: transicc -i "sRGB Color Space Profile (D50 Whitepoint).icc" -t3 -d0 -o "sRGB Color Space Profile.icm" LittleCMS ColorSpace conversion calculator - 4.0 [LittleCMS 2.02] Enter values, 'q' to quit R? 240 G? 0 B? 0 R=246.6732 G=0.0000 B=0.0000 If reversing the order of the profiles, the effect occurs in the blue channel as expected: tificc -n -i "sRGB Color Space Profile.icm" -t3 -d0 -o "sRGB Color Space Profile (D50 Whitepoint).icc" -e "chad-test.tif" "tificc2.2.sRGB_D65_ICCv2.sRGB_D50_ICCv2.abscol.d0.0.tif" The blue patch which had RGB=0 0 220 in the original image (6th row, 4th patch from the right) is RGB=0 0 252 in the resulting image: http://hoech.net/files/lcms-clipping/tificc2.2.sRGB_D65_ICCv2.sRGB_D50_ICCv2.abscol.d0.0.tif But transicc gives another (imho correct) value: transicc -i "sRGB Color Space Profile.icm" -t3 -d0 -o "sRGB Color Space Profile (D50 Whitepoint).icc" LittleCMS ColorSpace conversion calculator - 4.0 [LittleCMS 2.02] Enter values, 'q' to quit R? 0 G? 0 B? 220 R=0.0000 G=0.0000 B=249.7471 I verified the results against Argyll's cctiff which gives the correct values in the output tiffs: http://hoech.net/files/lcms-clipping/cctiff.sRGB_D50_ICCv2.sRGB_D65_ICCv2.abscol.tif http://hoech.net/files/lcms-clipping/cctiff.sRGB_D65_ICCv2.sRGB_D50_ICCv2.abscol.tif Any idea what's going on? Regards Florian ------------------------------------------------------------------------------ uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
