No-reference Quality Metric of Blocking Artifacts Based on Orthogonal Moments

Wei Zhang, Leida Li, Hancheng Zhu, Deqiang Cheng, Shu-Chuan Chu, John Roddick

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    This paper presents a no-reference quality metric for evaluating the blocking artifacts in images. It is based on a finding that the blocking artifact has direct effect on the distribution of discrete Tchebichef moments. The image is first divided into target blocks that cover potential artifacts. Tchebichef moments are then extracted as the block features. A local artifact score is computed by comparing the coefficients of the moments and the overall quality metric is obtained by taking the average of local estimates. Simulation results and comparisons demonstrate the advantage of the method.

    Original languageEnglish
    Pages (from-to)701-708
    Number of pages8
    JournalJournal of Information Hiding and Multimedia Signal Processing
    Volume5
    Issue number4
    Publication statusPublished - 1 Oct 2014

    Keywords

    • Blocking artifacts
    • Image quality assessment
    • Tchebichef moment

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