Color image processing method and apparatus therefor

摘要

A color-image processing method and apparatus for transforming color-separated RGB image signals into CMY color signals, extracting a minimum-value signal K based upon each of the CMY signals, subjecting each of the CMY signals and the minimum-value signal K to matrix transformation in accordance with prescribed transformation coefficients and outputting the transformed signals, whereby the RGB image signals can be transformed into CMYK color signals efficiently without sacrificing color reproducibility.