Am 19.04.09, 01:58 +1000 schrieb Ignacio Ruiz-de-Conejo: > Most of the time, the result is the expected one. But in all the different > profiles I have built, the tests show glitches, and I can find RGB values > that do not map to the desired output. > It is weird, for instance, that clamping does not produce a clean, rounded > number. And the presence of mis-behaving values here and there, not only in > the border of the regions. > Maybe the rounding and interpolation is a limitation I can't avoid,and with > deeper effects than I expected. > > You can find sources in http://docs.google.com/Doc?id=dfscpqm8_45t4q5ffst
Beside not being able to open your file, did you try the cmsFLAGS_NOTPRECALC flag for better precission? I would assume you are working already at 16-bit data. lcms-2.0 will and SampleICC, an other open source CMM, can work on floating point data. I must confess that I have no idea about the real interpolation precission. I just know that film people really care for round tripping. If that requirement is sucessfully meet with the floating point 'mpet' tag kind of transforms is not known to me. But other have elaborated shurely and you may find perhaps even in the archives of this email list. kind regards Kai-Uwe Behrmann -- developing for colour management www.behrmann.name + www.oyranos.org ------------------------------------------------------------------------------ Stay on top of everything new and different, both inside and around Java (TM) technology - register by April 22, and save $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco. 300 plus technical and hands-on sessions. Register today. Use priority code J9JMT32. http://p.sf.net/sfu/p _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
