| 摘要 |
An image processing apparatus reproduces a color image inputted through an input device, such as an image reader. Information regarding separated colors, e.g. yellow, magenta and cyan, of the input color image is binarized and the image is expressed in eight colors (23). Color error between quantized output image for the evaluation pixels and quantized input image therefor is calculated on pixel basis for each color component. The color errors for the evaluation pixels are weighted in accordance with a predetermined weighting matrix, and the quantizing value for a pixel in question is determined so that the sum of the weighted color errors and the color error of the pixel in question become minimal. Hence, the output image is reproduced in a color close to that of the input image.
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