Optimal block boundary pre/postfiltering for wavelet-based image and video compression. |
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Authors: | Jie Liang Chengjie Tu Trac D Tran |
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Affiliation: | School of Engineering Science, Simon Fraser University, Burnaby, Canada. jiel@sfu.ca |
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Abstract: | This paper presents a pre/postfiltering framework to reduce the reconstruction errors near block boundaries in wavelet-based image and video compression. Two algorithms are developed to obtain the optimal filter, based on boundary filter bank and polyphase structure, respectively. A low-complexity structure is employed to approximate the optimal solution. Performances of the proposed method in the removal of JPEG 2000 tiling artifact and the jittering artifact of three-dimensional wavelet video coding are reported. Comparisons with other methods demonstrate the advantages of our pre/postfiltering framework. |
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