Image enhancement using sorted histogram specification and POCS postprocessing

Il Lyong Jung, Chang-Su Kim

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3 Citations (Scopus)

    Abstract

    An image enhancement algorithm based on the sorted histogram equalization (SHE) and specification (SHS) is proposed in this work. Although SHE and SHS can generate an arbitrary output histogram exactly, they yield false contour artifacts and amplify noises in many cases. To reduce these artifacts, we propose a postprocessing scheme using the projection onto convex sets (POCS) theory. Specifically, the proposed algorithm iteratively processes the output images of SHE and SHS using the low-pass, boundary and dithering conditions. Simulation results demonstrate that the proposed algorithm provides an excellent image quality, by improving the contrast while reducing undesired artifacts.

    Original languageEnglish
    Title of host publication2007 IEEE International Conference on Image Processing, ICIP 2007 Proceedings
    PagesI545-I548
    DOIs
    Publication statusPublished - 2006
    Event14th IEEE International Conference on Image Processing, ICIP 2007 - San Antonio, TX, United States
    Duration: 2007 Sept 162007 Sept 19

    Publication series

    NameProceedings - International Conference on Image Processing, ICIP
    Volume1
    ISSN (Print)1522-4880

    Other

    Other14th IEEE International Conference on Image Processing, ICIP 2007
    Country/TerritoryUnited States
    CitySan Antonio, TX
    Period07/9/1607/9/19

    Keywords

    • Histogram equalization
    • Histogram specification
    • Image enhancement
    • POCS

    ASJC Scopus subject areas

    • General Engineering

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