Patent ID: 6504952
Filing Date: 2003-01-07
Classification: H04N

Abstract:
An image processing method, comprising the steps of:i) transforming R, G, and B colors of each of pixels in an image, which is represented by an image signal having been acquired with an image sensing operation, into chromaticity values, ii) calculating chromaticity mean values, which are mean values of the chromaticity values having been obtained with respect to the pixels in the image, iii) transforming said chromaticity mean values into tristimulus values in accordance with physiological primary colors, and iv) regarding said tristimulus values in accordance with physiological primary colors as the white of a photographing illuminant, under which said image signal was acquired, and transforming said image signal such that said tristimulus values may coincide with chromaticity values of a white point of a reference photographing illuminant, a processed image signal being thereby obtained.