Color data gamut conversion using three color lightness ranges in an apparatus, method, and computer-readable recording medium with a program making a computer execute the method recorded therein

摘要

A third color data which is at the same hue angle as that of first color data and also has the highest chroma within a color gamut of a printer and a fourth color data for an achromatic color having the same lightness as that of the third color data are acquired. First color data are converted to second color data based on the target color data located at any of a first line linking the fourth color data to color data corresponding to the black color in the color gamut of the printer, on a second line linking the fourth color data to color data corresponding to the white color in the color gamut of the printer, or on a third line linking the fourth color data to the third color data.