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It is well known that at low bit rates, a block-based discrete cosine transform compressed image or video can exhibit visually annoying blocking and ringing artifacts. Low-pass filters are very effective in reducing the blocking artifacts in smooth areas. However, it is difficult to achieve a satisfactory result for ringing artifact removal using only an adaptive filtering scheme. This paper presents...
In this paper, a fast and effective content-adaptive post-processing method is proposed for reducing the blocking artifacts of the block-coded images. The first step of this scheme is the block classification that classifies every 8times8 block as one of the three types: plain, edge and texture, based on its statistical characteristics. Our experimental results show that this classification algorithm...
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