Sughrue, Mion, Zinn, Macpeak & Seas, PLLC
Adaptive postprocessing system for reducing blocking effects and ringing noise in decompressed image signals
 An adaptive signal filtering method is provided to reduce blocking effects caused by decompression the block-based compressed images. The method includes the steps of generating binary edge map information by globally thresholding and locally thresholding the decompressed image; determining whether the binary edge map information within a filter window corresponding to respective pixels corresponds to a homogeneous area or an edge area, by using the binary edge map information corresponding to the filter window; generating a filtered pixel value corresponding to a respective pixel using the filter window which has a predetermined first weight factors for the homogeneous area when the binary edge map information is determined to be a homogeneous area in the determining step; adapting a predetermined second weight factors according to binary edge map information included in the filter window when the binary edge map information determined as an edge area in the second step; and generating a filtered pixel value for the respective pixel, using the filter window which has adapted second weight factors in said adapting step. 
Samsung Electronics Co., Ltd.
G H H
G06T H04N H04N
inventional inventional inventional
Hyun-Wook Yung-Lyul
Park Lee