COLOR CONVERSION METHOD, NON-TRANSITORY RECORDING MEDIUM STORING COMPUTER READABLE PROGRAM, AND IMAGE PROCESSING APPARATUS

摘要

A color conversion method includes: a first acquisition step of acquiring a first color conversion table which defines mapping from a first color space to a second color space, and a second color conversion table which defines mapping from the second color space to a third color space; a second acquisition step of acquiring a color in the second color space to be subjected to color conversion; a computation step of computing an element group and a weight of each element included in the element group; a determination step of determining whether or not the element group in the second color conversion table; and a processing step of performing either first processing of performing inverse conversion and computing the color in the third color space, or second processing of performing an interpolation computation and computing the color in the third color space.

主权项

1. A color conversion method comprising:
a first acquisition step of acquiring a first color conversion table which defines mapping from a first color space to a second color space, and a second color conversion table which defines mapping from the second color space to a third color space of an output device; a second acquisition step of acquiring a color in the second color space to be subjected to color conversion from the first color conversion table; a computation step of computing an element group and a weight of each element included in the element group that are required to compute a color in the third color space of the output device corresponding to the color in the second color space to be subjected to the color conversion and acquired in the first acquisition step, the element group including as an element the color in the second color space in the second color conversion table; a determination step of determining whether or not the element group in the second color conversion table that is required to compute the color in the third color space of the output device corresponding to the color in the second color space is outside a color gamut of the output device; and a processing step of performing, according to a determination result obtained in the determination step, either first processing of performing inverse conversion by using the first color conversion table and computing the color in the third color space of the output device corresponding to the color in the second color space to be subjected to the color conversion, or second processing of performing an interpolation computation by using the element group and the weight of each element computed in the computation step and computing the color in the third color space of the output device corresponding to the color in the second color space to be subjected to the color conversion.