Abstract: To provide a color image forming and correcting method and apparatus for reducing the difference in color reproducibility in the image system or image device and achieving proper color reproduction. Constitution An information value specifying a color gamut in coordinate system of the perceptual color space is entered and associated with an information value specifying a pre-set other color gamut defined by a pre-set other color gamut by fuzzy processing. By such association, the color gamut in the perceptual color space is converted into a pre-set color gamut in the coordinate system of the perceptual color space. The information value specifying the converted color gamut in the coordinate system of the perceptual color space is outputted.

Abstract: A color image forming and correcting method and apparatus employ a combination of neural network and fuzzy logic processing to reduce differences in reproducibility in the image system of device. An information value specifying a color gamut in coordinate system of the perceptual color space is entered and associated with an information value specifying a preset other color gamut by the combined techniques. The color gamut is converted into a preset color gamut in the coordinate system. The information value specifying the converted color gamut is outputted.