Patent ID: 8818126

Claim:
A block-based image denoising method comprising: determining similarities between a current block and reference blocks within a search range around the current block, the current block being from among blocks of an input image; determining weights of the reference blocks surrounding the current block based on the similarities; changing the weights of the reference blocks to reduce differences in boundaries between the resultant block obtained by denoising the current block, and neighboring blocks, by performing soft thresholding on the weights using a threshold determined from an average luminance of each of the current block and the neighboring blocks, before regularization; and generating a resultant block by denoising the current block based on the weights of the reference blocks, wherein the current block is one of a plurality of blocks which are divided from the input image and non-overlapping to be sequentially processed, wherein each block of the plurality of blocks includes a plurality of pixels in the input image, and wherein the search range around the current block comprises one of a temporally or spatially adjacent region of the current block.