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From: Andrea G. <da...@ti...> - 2013-04-09 16:31:05
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Hi, I tested the creation and use of a Lab profile with different white points. I tried transicc by using the default illuminant in the following way: transicc -i*Lab LittleCMS ColorSpace conversion calculator - 4.2 [LittleCMS 2.04] Enter values, 'q' to quit L*? 50 a*? 0 b*? 50 R=135.1773 G=116.7732 B=14.9372 Then I tried transicc by using the D65 illuminant and I got this transicc -i*LabD65 LittleCMS ColorSpace conversion calculator - 4.2 [LittleCMS 2.04] Enter values, 'q' to quit L*? 50 a*? 0 b*? 50 R=135.1773 G=116.7732 B=14.9372 Is this correct? I also tried tificc by translating a 16-bit Lab image to sRGB using this command lines: tificc -i*Lab MyLabImage.tif D50.tif tificc -i*LabD65 MyLabImage.tif D65.tif but comparing D50.tif and D65.tif are identical. (I used a binary-file compare utility) I've done something wrong or there is a bug somewhere? Thanks a lot Andrea |