Evaluation of optimal sharpness enhancement for different image content and different display technologies

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    Abstract

    This paper presents a subjective experiment performed to determine the optimal level of sharpness enhancement for various image content and two display technologies. For the experiment, a peaking algorithm was used as sharpness enhancement method and its gain parameter, which controls the amount of sharpness enhancement, was optimized. Eleven still images were used as image material, and for each original, eight levels of sharpness enhancement were shown. Subjects were asked to select the image that they prefer most on overall image quality. To study the effect of the display technology, the experiment was performed on a CRT monitor and LCD panel. The results show an effect of content: lower gains were preferred for faces and content with flat areas, while higher gains were preferred for highly textured images. We also found an effect of display: in general for a given image, the averaged gain preferred on the CRT was equal or higher than on the LCD. The results can be used to optimize sharpness enhancement algorithms to image content and display type in agreement with the averaged preference of viewers.
    Original languageEnglish
    Title of host publicationHuman Vision and Electronic Imaging IX, 19-21 January 2004, San Jose, CA
    EditorsB.E. Rogowitz, T.N. Pappas
    PublisherSPIE
    Pages234-242
    DOIs
    Publication statusPublished - 2004
    Eventconference; Human Vision and Electronic Imaging IX, -
    Duration: 1 Jan 2004 → …

    Publication series

    NameProceedings of SPIE
    Volume5292
    ISSN (Print)0277-786X

    Conference

    Conferenceconference; Human Vision and Electronic Imaging IX,
    Period1/01/04 → …
    OtherHuman Vision and Electronic Imaging IX,

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