Image processing device and method of the same

Abstract

The present invention provides an image processing device that avoids occurrence of unintended color conversion during the logical operation processing, and produces high-resolution images. In the image processing device of the present invention, after an input color conversion unit converts the RGB color space into the CMYK color space, a first color conversion unit executes color conversion of an area subjected to the logical operation processing into the CMY color space, and a logical operation unit executes the logical operation processing. Thereafter, a second color conversion unit executes color conversion of a logical operation result into the CMYK color space. On the other hand, a pixel value comparison unit compares the color values of the CMY color space before and after the logical operation by the logical operation unit; and if coincident, an output image selection unit selects the color values converted by the input color conversion unit as they are. Thereby, as a result of the logical operation, if the color values of the images are not varied, the original color values in the CMYK color space are adopted as the output result; and therefore, there will not be unintended color conversion executed by the first and second color conversion units.