Patent ID: 6633670
Filing Date: 2003-10-14
Classification: H04N

Abstract:
A method of generating a mask for a layered decomposition of an image, said method comprising the steps of:(a) partitioning said image into a plurality of first sub-images and into a plurality of second sub-images dimensionally differing from said first sub-images, said first and said second sub-images comprising pluralities of pixels; (b) assigning a first sub-image mask value to an evaluation pixel according to a relationship of a luminance of said evaluation pixel and a sub-image luminance of a first sub-image containing said evaluation pixel; (c) assigning a second sub-image mask value to said evaluation pixel according to a relationship of said luminance of said evaluation pixel and a sub-image luminance of a second sub-image containing said evaluation pixel; and (d) setting a mask value for a pixel in said mask spatially corresponding to said evaluation pixel according to a relationship of said first and second sub-image mask values for a plurality of pixels of said first and said second sub-images containing said evaluation pixel.