A Spatially Adaptive Gradient-Projection Algorithm to Remove Coding Artifacts of H.264

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概要

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• In this paper, we propose a spatially adaptive gradient-projection algorithm for the H.264 video coding standard to remove coding artifacts using local statistics. A hybrid method combining a new weighted constrained least squares (WCLS) approach and the projection onto convex sets (POCS) approach is introduced, where weighting components are determined on the basis of the human visual system (HVS) and projection set is defined by the difference between adjacent pixels and the quantization index (QI). A new visual function is defined to determine the weighting matrices controlling the degree of global smoothness, and a projection set is used to obtain a solution satisfying local smoothing constraints, so that the coding artifacts such as blocking and ringing artifacts can be simultaneously removed. The experimental results show the capability and efficiency of the proposed algorithm.

• （社）電子情報通信学会の論文
• 2011-05-01

著者

• Hong Min-cheol

  Soongsil University

• CHOI Kwon-Yul

  Soongsil University

関連論文

• Low Computing Post Processing to Suppress Annoying Artifacts of Compressed Video Sequences(Image Processing and Video Processing)
• Adaptive Pre-Processing Algorithm to Improve Coding Performance of Seriously Degraded Video Sequences for H.264 Video Coder
• A Spatially Adaptive Gradient-Projection Image Restoration
• A Spatially Adaptive Gradient-Projection Algorithm to Remove Coding Artifacts of H.264

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