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DETECTION AND REDUCTION OF RINGING ARTIFACTS BASED ON BLOCK-GRID POSITION AND OBJECT EDGE LOCATION
DETECTION AND REDUCTION OF RINGING ARTIFACTS BASED ON BLOCK-GRID POSITION AND OBJECT EDGE LOCATION
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机译:基于块网格位置和对象边缘位置的振铃伪影的检测和减少
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摘要
The invention proposes a method (FIG. 2) and respective devices (FIG. 2) and software for an algorithm to detect and remove ringing artefacts and mosquito noise in decompressed pictures and video. The proposed idea is based on the observation that ringing is spatially localized within a block, which contains at least a part of an object edge, in particular a strong object edge. Blocks affected by ringing are detected by analyzing (1) a block grid position, location (2) of an object edge and by comparing (7) local spatial activities (Act af, Act nor) of adjacent blocks, i.e. affected blocks and nor) not-affected blocks.
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