Patent ID: 7551792
Filing Date: 2009-06-23
Classification: G06T,H04N

Abstract:
1. A method for reducing artifacts in an input image, comprising a processor for performing step of the method, comprising the steps of: generating, on a pixel by pixel basis, a variance image from the input image, in which each pixel has a variance; partitioning the input image into a plurality of blocks of pixels; defining a set of classifications, the set of classifications including smooth, texture, and edge; assigning a particular classification to each block of pixels of the input image according to the variance image, to generate smooth blocks, texture blocks, and edge blocks; and applying, using the processor, a fuzzy filter only to each pixel of each edge block to preserve strong edges, while removing weak edges, in which a fuzzy transformation defines a relationship between a spatial pixel x where x c is a center pixal of the filtering window.