Method, apparatus, and program for image processing capable of producing high-quality achromatic colored output image, and medium storing the program

摘要

A method, apparatus, and program of image processing for generating graphics data according to picture description instructions based on original image data of full-color, and a medium for storing the program. The method, apparatus, and program include a chromatic tester, an obtainer, a color converter, and a converting condition designator. The chromatic tester determines whether a pixel of the original image data is chromatic or achromatic. The obtainer obtains an image property of the pixel. The color converter converts the original image data into CMYK data for printing according to a predetermined converting condition. The converting condition designator designates a type of the predetermined converting condition for the pixel determined as achromatic by the chromatic tester according to the image property obtained by the obtainer.