The ICC spec does not explicitely support a absolute rendering as you request here. (It might by refered as well as CIE absolute RI.) A targ or lumi and the chad tag might be optional in a ICC profile. So all depends.
kind regards Kai-Uwe Behrmann -- developing for colour management www.behrmann.name + www.oyranos.org Am 15.01.08, 03:57 -0600 schrieb Michael A. Litscher: > Thank you all, > > So, if the charTargetTag can't be relied upon to exist, let alone in a > consistent format and scale, how might I get the absolute luminance XYZ value > using the LittleCMS library? The function cmsIsTag returns true for > icSigLuminanceTag, but none of the exported cmsTake functions seem capable of > returning an XYZ structure or just Y for icSigLuminanceTag. The ReadICCXYZ > function looks capable, but it isn't exported. > > Also, will whatever function which returns icSigLuminanceTag return only a > valid Y value, or valid X, Y, and Z values? > > Thank you all again for your time, > > Michael A. Litscher > CTO, ColorMetrix Technologies, LLC > ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
