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  • POCS-based Blocking Artifacts Suppression with Region Smoothness Constraints for Graphic Images

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    Author(s)
    Liew, AWC
    Yan, H
    Griffith University Author(s)
    Liew, Alan Wee-Chung
    Year published
    2004
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    Abstract
    It is well known that low bit rate BDCT coded image exhibits visually annoying coding artifacts. In this paper, we proposed a POCS (projection onto convex sets)-based deblocking algorithm using a novel region smoothness constraint for the class of graphic images. For this type of image, there usually exists large smooth varying regions. Current POCS based deblocking algorithms usually do not enforce smoothness across several blocks. In our method, the BDCT (block-based discrete cosine transform) coded image is modeled using a smooth, spatially adaptive, thin-plate spline surface, and the region smoothness constraint set is ...
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    It is well known that low bit rate BDCT coded image exhibits visually annoying coding artifacts. In this paper, we proposed a POCS (projection onto convex sets)-based deblocking algorithm using a novel region smoothness constraint for the class of graphic images. For this type of image, there usually exists large smooth varying regions. Current POCS based deblocking algorithms usually do not enforce smoothness across several blocks. In our method, the BDCT (block-based discrete cosine transform) coded image is modeled using a smooth, spatially adaptive, thin-plate spline surface, and the region smoothness constraint set is constructed from this spline surface. The spline modeling allows us to model the long range smoothness across the smooth region. Simulation experiments indicated that blockiness in smooth regions is effectively suppressed while genuine edges are preserved.
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    Conference Title
    PROCEEDINGS OF THE 2004 INTERNATIONAL SYMPOSIUM ON INTELLIGENT MULTIMEDIA, VIDEO AND SPEECH PROCESSING
    Publisher URI
    http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=9799
    DOI
    https://doi.org/10.1109/ISIMP.2004.1434126
    Copyright Statement
    © 2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
    Publication URI
    http://hdl.handle.net/10072/24875
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    • Conference outputs

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