A generic post-deblocking filter for block based image compression algorithms |
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| Authors: | Nelson C Francisco Nuno MM Rodrigues Eduardo AB da Silva Sérgio MM de Faria |
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| Affiliation: | 1. Instituto de Telecomunicações, Apartado 4163, 2411-901 Leiria, Portugal;2. ESTG, Inst. Pol. Leiria, Apartado 4163, 2411-901 Leiria, Portugal;3. PEE/COPPE, Univ. Fed. Rio de Janeiro, CP 68504, 21945-970 RJ, Brazil;4. DEL/Poli, Univ. Fed. Rio de Janeiro, CP 68504, 21945-970 RJ, Brazil;1. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China;2. School of Geosciences, China University of Petroleum (East China), Tsingtao 266580, China;1. Institute of Mathematics, Slovak Academy of Sciences, Slovakia;2. Dept. of Comp. Science, University of Manitoba, Canada;3. Dept. of Comp. Science and Soft. Eng., Concordia University, Canada;4. Dept. of Comb. and Opt., University of Waterloo, Canada;5. School of Comp. Science, Carleton University, Canada;6. Dept. of Math. and Comp. Science, Wesleyan University, USA;7. Dept. of Comp. Science, Rutgers University, USA;8. Institute of Mathematics, UNAM, Mexico |
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| Abstract: | In this paper we propose a new post-processing deblocking technique that is independent of the compression method used to encode the image. The development of this filter was motivated by the use of Multidimensional Multiscale Parser (MMP) algorithm, a generic lossy and lossless compression method. Since it employs an adaptive block size, it presents some impairments when using the deblocking techniques presented in the literature. This led us to the development of a new and more generic deblocking method, based on total variation and adaptive bilateral filtering.The proposed method was evaluated not only for still images, but also for video sequences, encoded using pattern matching and transform based compression methods. For all cases, both the objective and subjective quality of the reconstructed images were improved, showing the versatility of the proposed technique. |
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