Signal adaptive filtering method and signal adaptive filter for reducing blocking effect and ringing noise

摘要: A signal adaptive filtering method is disclosed for reducing a blocking effect and ringing noise of an image data. gradient the data calculated each pixel Then, compared with global threshold value (T g ) which determined based on predetermined quantization step size (Q), edge map information generated. Meanwhile, local n block having size, An OR operation performed respect to generate binary information. sized filter window applied determine whether edges are present in within window. Afterwards, values corresponding filtered, by pixel, using first weighted new if it that not present. The second No located at center represents edge.