Wenzel Jakob <wen...@cs.cornell.edu> schrieb: >As you already hinted, this still does not work -- the value gets >clipped before ever reaching the profile. Is there a way to avoid this, > >or am I asking for something unreasonable?
I am not sure if a floating point 'mpet' profile can scale out of gamut input. A more traditional and powerful way is to do tonemapping on the HDR data outside the CMM. That would be kind if intelligent stage befor sending to the dump ICC engine. >On 09/07/2012 05:09 PM, Marti Maria wrote: >> If you define a colorspace that has transfer functions of gamma 1.0, >> primaries Rec709 and D65 as >> white point you cannot call it "sRGB", just because this is not sRGB >> but something close but not >> sRGB. >> BTW, obviously you cannot use the same sRGB as the input, that would >> make impossible to >> encode out of gamut colors, and doing (0.5, 0.5, 1000) clips the >value >> on the input - it >> doesn't even reach the profile. The sRGB curve is only defined inside the default range of 0.0->1.0. So you need a profile with an appropriate gamma description on input. Linear gamma of1.0 is the most easy way. kind regards Kai-Uwe ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
