Patent ID: 7554705

Claim:
A method for mapping color values from a first gamut to a second gamut for printing systems and other devices, the method comprising: obtaining first device-independent color values in a first gamut; converting the first device-independent color values to a first set of RGB color values in an RGB color space that is substantially perceptually uniform; applying, with a processor, a nonlinear tone compression mapping to the first RGB color values to produce second RGB color values; converting the second RGB values to second device-independent color values in the second gamut; wherein applying the nonlinear tone compression mapping comprises: applying, with a processor, a black point correction offset to second RGB color values corresponding to a first range of tones; wherein the black point correction is a maximum in a vicinity of black and approaches zero in a vicinity of white; and wherein a slope of the black point corrected RGB values approaches one in the vicinity of white.