Not 100% clear on the documentation?
I want to create a cform that converts from RGB to Lab out of a typical 'Matrix/TRC' profile. So far, I plan to use this code to accomplish this :
P3Prof = iccread('Display P3.icm');
cform_XYZP3 = makecform('mattrc',P3Prof,'Direction','forward')
cform_LabP3 = makecform('xyz2lab');
LabP3 = applycform(rgb,cform_LabP3);
Does that make any sense?