Hi, >Hi, which of the following should give more accurate results (I don't care >about speed) ?
They are not same. First one, using cmsCreateTransform() is doing a transformation from XYZ to an RGB profile. The second is emulating which would be the appearance of first, when viewed under a device characterized by the same profile as the destination. Inside gamut all should be same, but on gamut boundaries some values may change. Hence, you got slightly different values in same zones. With this one you can control which values are out of gamut, thought. I guess you just want the first one, which is the most accurate.. For controlling accuracy vs. speed there are some flags. You have already choosen cmsFLAGS_NOTPRECALC which turns to be the most accurate ands slow. Regards, Marti Maria The little cms project http://www.littlecms.com ----- Original Message ----- From: "Louis Solomon [SteelBytes]" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, August 27, 2004 7:23 AM Subject: [Lcms-user] accuracy ... Hi, which of the following should give more accurate results (I don't care about speed) ? I am guessing cmsCreateTransform(), and yes I do get different results for some input XYZs, altough not very different. cmsHTRANSFORM trans_XYZ_to_customRGB = cmsCreateTransform( profile_XYZ,TYPE_XYZ_DBL, profile_customRGB,TYPE_RGB_DBL, INTENT_ABSOLUTE_COLORIMETRIC, cmsFLAGS_NOTPRECALC); cmsHTRANSFORM trans_XYZ_to_customRGB_withgamutcheck = cmsCreateProofingTransform( profile_XYZ,TYPE_XYZ_DBL, profile_customRGB,TYPE_RGB_DBL, profile_customRGB, INTENT_ABSOLUTE_COLORIMETRIC,INTENT_ABSOLUTE_COLORIMETRIC, cmsFLAGS_NOTPRECALC|cmsFLAGS_SOFTPROOFING|cmsFLAGS_GAMUTCHECK); Louis Solomon www.steelbytes.com ------------------------------------------------------- SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media 100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33 Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift. http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285 _______________________________________________ Lcms-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/lcms-user ------------------------------------------------------- SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media 100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33 Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift. http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285 _______________________________________________ Lcms-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/lcms-user
