Patent ID: 6346994
Filing Date: 2002-02-12
Classification: G06T

Abstract:
An image processing system which conducts necessary correction processing on digital image data, comprising:shadow region brightness value extracting means for extracting a shadow region brightness value which is a brightness value of a low brightness pixel from image data of input image; backlight correction amount storing means for storing a backlight correction amount indicative of an appropriate degree of correction on backlight input image; backlight correction table generating means for generating a backlight correction table characterized by, based on said shadow region brightness value extracted by said shadow region brightness value extracting means and said backlight correction amount stored in said backlight correction amount storing means, not correcting a pixel whose brightness value falls in the range between â€œ0â€  and said shadow region brightness value and correcting a pixel whose brightness value is higher than said shadow region brightness value so as to increase the brightness value; and LUT converting means for performing table conversion on image data of said input image based on said backlight correction table generated by said backlight correction table generating means to conduct color conversion processing of all pixels of the image data.