Patent ID: 6973221
Filing Date: 2005-12-06
Classification: H04N

Abstract:
1. A method, comprising: partitioning an image into at least two or more sub-blocks, each of the at least two or more sub-blocks containing a predetermined number of pixels wherein at least one boundary between the at least two or more sub-blocks is defined, each of the pixels having a pixel video value, respectively determining whether a predetermined condition is satisfied, wherein the predetermined condition is based upon calculating average mean and average variance values of said two or more sub-blocks; and, upon satisfaction of the predetermined condition, at least for a first pixel disposed proximal to the boundary, recalculating the pixel video value for the first pixel, said recalculating step being based at least upon the pixel video value of a second pixel being disposed proximal to the first pixel; wherein the average variance values are approximated using a piece-wise linear estimate.