Patent ID: 6535301
Filing Date: 2003-03-18
Classification: H04N

Abstract:
A color adjustment device for performing color separation of color image data for each predetermined element color and adjusting said color image data in enhancement to provide each desired color in result of color image output delivered for each element color by an image output device, comprising:a chromaticity judging unit which determines a value of chromaticity of each pixel according to said color image data; an object chromaticity pixel statistical calculation unit which performs statistical calculation on pixels having chromaticity values determined, by said chromaticity judging unit, to meet a predetermined range of chromaticity; a color adjustment degree judging unit which determines a degree of color adjustment so as to eliminate a difference between a predetermined optimum value for pixels meeting said predefined range of chromaticity and a result value attained in said statistical calculation and for regulating said degree of color adjustment according to an occupancy ratio of pixels subjected to said statistical calculation to the total number of pixels; and color adjusting unit which carries out color adjustment of said image data according to the regulated degree of color adjustment; wherein, for each given pixel of the color image data: said chromaticity judging unit determines a value of chromaticity of said given pixel, when said judged value of chromaticity of said given pixel meets a predetermined range of chromaticity, the object chromaticity pixel statistical calculation unit performs a statistical calculation with respect to the given pixel; after said statistical calculation, said color adjustment degree judging unit determines a degree of color adjustment, and regulates said degree using an occupancy ratio of the number of pixels subjected to said statistical calculation to the total number of pixels; after regulating said degree of color adjustment, said color adjusting unit carries out color adjustment on said image data of said given pixel according to the regulated degree of color adjustment.