Patent ID: 7177463
Filing Date: 2007-02-13
Classification: G06T

Abstract:
1. An image processing apparatus comprising: judgment means for judging a color of an image for each region having a predetermined size in an image superposed with noise; determination means for determining, for each region, a parameter for a noise removal process in correspondence with a color determined by said judgment means; and control means for controlling execution of the noise removal process, for each region in accordance with a corresponding parameter determined by said determination means, wherein said control means sets a region consisting a pixel of interest and its surrounding pixels in the image, selects randomly a pixel used for comparing with the pixel of interest from the surrounding pixels, determines a renewed pixel value of the pixel of interest according to a pixel value of the selected pixel if an absolute value of a difference between a pixel value of the pixel of interest and a pixel value of the selected pixel is equal to or less than a threshold value, and executes the noise removal process by updating a pixel value of the pixel of interest to the renewed pixel value.