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Proceedings Paper

Reduction of MPEG ringing artifacts using adaptive sigma filter
Author(s): Hao Pan
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Paper Abstract

In this paper, we propose a novel computationally efficient post-processing algorithm to reduce ringing artifacts in the decoded DCT-coded video without using coding information. While the proposed algorithm is based on edge information as most filtering-based de-ringing algorithms do, this algorithm solely uses one single computationally efficient nonlinear filter, namely sigma filter, for both edge detection and smoothing. Specifically, the sigma filter, which was originally designed for nonlinear filtering, is extended to generate edge proximity information. Different from other adaptive filtering-based methods, whose filters typically use a fixed small window but flexible weights, this sigma filter adaptively switches between small and large windows. The adaptation is designed for removing ringing artifacts only, so the algorithm cannot be used for de-blocking. Overall, the proposed algorithm achieves a good balance among removing ringing artifacts, preserving edges and details, and computational complexity.

Paper Details

Date Published: 19 January 2006
PDF: 10 pages
Proc. SPIE 6077, Visual Communications and Image Processing 2006, 607722 (19 January 2006); doi: 10.1117/12.643503
Show Author Affiliations
Hao Pan, Sharp Labs of America (United States)

Published in SPIE Proceedings Vol. 6077:
Visual Communications and Image Processing 2006
John G. Apostolopoulos; Amir Said, Editor(s)

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