Method to improve overlay mapping of out-of-gamut

摘要

The present disclosure relates a method to improve overlay mapping of out-of-gamut. The method includes: step 10, converting a RGB digital value to a L*a*b* value of a Lab color space; step 20, determining a hue plane where the color point P located, and further determining values of a hue angle H, a color saturation C, and a brightness L; step 30, determining a reference color point P_i by combing intersections color point P_C and color point P_S with the color point L_m and a parameter α; step 40, determining whether the color point P inside or outside a line |L_mP_i|; and step 50, converting a L*a*b* value into a RGB value in the target gamut. The method to improve the overlay mapping of out-of-gamut according to the present disclosure causes multiple colors to no longer be mapped to the same color point.