I'm currently generating some test profiles for testing color-managed systems: http://forum.doom9.org/showthread.php?p=1638446#post1638446
I would like to generate a "self-cancelling" test profile, and by that I mean, a RGB device test profile that contains video card gamma tables and profiling information such that the calibration and profiling information cancel each other out, resulting in a "no-op" (i.e. sRGB) profile.
I tried the following procedure: targen -d3 strangecancel fakeread -k strange.cal sRGB.icm strangecancel colprof strangecancel collink sRGB.icm strangecancel.icm srgb2strangecancel.icm cctiff srgb2strangecancel.icm sample.jpg sample.strangecancel.jpgIn the end I expect sample.strangecancel.jpg to look identical (or at least very similar) to sample.jpg. Instead I end up with sample.strangecancel.jpg looking "warm", as if the calibration curves had not been applied to it. However, if I try to use applycal after colprof, or if I try to apply strange.cal in cctiff, I end up with the opposite (blueish tint as if only the calibration had been applied but no profiling).
What am I doing wrong? -- Etienne Dechamps
