Patent ID: 7142710

Claim:
An image processing method for subjecting image data from an image input apparatus to a color transform and to an image processing for an output apparatus, comprising: conducting a first color transform process to practice color transform from data for a CMY system into data for a RGB system; and conducting a second color transform process to practice a color transform from data for the RGB system to data for the CMY system, wherein the first color transform process and the second color transform process are in an approximately inverse relation with each other, and are practiced in such a way as to make tristimulus values of colors in an image printed by a printer using the CMY system approximately equal to tristimulus values of colors in an image displayed on a display using the RGB system, or to make color values derived from the tristimulus values of colors in an image printed by the printer using the CMY system approximately equal to color values derived from the tristimulus values of colors in an image displayed on the display using the RGB system.