US Patent 7119925 Image processing, image reading apparatus and image processing method

An image processing apparatus stores image data according to color constituent, sets an order of correction value data to correct input image data for each color constituent according to a command that specifies an output order of the color constituents, performs color correction in a color correction operation circuit using the specified correction value data, and outputs the image data. Without an output order change circuit, it is possible to perform the color correction and output image data of the color constituents according to an output device, resulting in a compact apparatus.