Klaus Kompatscher wrote:
I got a strange situation with colprof. When creating a profile with the attached ti3 file I get a black point of approx L41 a 17 b 37. K black is L23 a 3 b 2. I can't find any patch L41 a 17 b37 (or close to it) on the test chart. Whats wrong?
Hi, the device response is a little strange, as there seems to be negligible cyan. The strange gamut has then tricked the black point finding code into settling on a local rather than global minimum. I will tweak the code to try and avoid such a situation, but the device response is something you will have to attend to :-) A truer black point would be Lab = 24.219132 1.033186 -1.430985. Note that the black point doesn't correspond to any particular patch, it is the darkest black within gamut in the direction of K only. cheers, Graeme Gill.