Image restoration of JPEG encoded images via block matching and wiener filtering

Yutaka Takagi, Takanori Fujisawa, Masaaki Ikehara

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    In this paper, we propose a method for removing block noise which appears in JPEG (Joint Photographic Experts Group) encoded images. We iteratively perform the 3D wiener filtering and correction of the coefficients. In the wiener filtering, we perform the block matching for each patch in order to get the patches which have high similarities to the reference patch. After wiener filtering, the collected patches are returned to the places where they were and aggregated. We compare the performance of the proposed method to some conventional methods, and show that the proposed method has an excellent performance.

    Original languageEnglish
    Pages (from-to)1993-2000
    Number of pages8
    JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
    VolumeE100A
    Issue number9
    DOIs
    Publication statusPublished - 2017 Sep 1

    Keywords

    • Block matching
    • Block noise
    • Discrete cosine transform
    • JPEG
    • Minimiza-tion problem
    • RGB color space
    • Signification
    • Wiener filter
    • YCbCR color space

    ASJC Scopus subject areas

    • Signal Processing
    • Computer Graphics and Computer-Aided Design
    • Applied Mathematics
    • Electrical and Electronic Engineering

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