Visibility enhancement via optimal gamma tone mapping for OST displays under ambient light

Kyu Ho Lee, Jae Woo Kim, Jong Ok Kim

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

    3 Citations (Scopus)

    Abstract

    Visibility of the overlaid virtual image is sensitively affected by surrounding illumination in OST (optical see-through) displays. Ambient light may especially deteriorate the visibility of low gray levels, whose luminance is comparable to ambient light. Therefore, we first derive a luminance model based on actual measurements under various ambient lights, and use this model to extract low gray-level region (LGR), which suffers severely from contrast loss. It was experimentally found that gamma tone mapping is the most appropriate for LGR contrast enhancement of OST displays. The gamma value is optimally determined by cost minimization. Visibility enhancement is verified by experiments on a practical setup with a variety of ambient light levels and images.

    Original languageEnglish
    Title of host publication2017 IEEE International Conference on Image Processing, ICIP 2017 - Proceedings
    PublisherIEEE Computer Society
    Pages470-474
    Number of pages5
    ISBN (Electronic)9781509021758
    DOIs
    Publication statusPublished - 2017 Jul 2
    Event24th IEEE International Conference on Image Processing, ICIP 2017 - Beijing, China
    Duration: 2017 Sept 172017 Sept 20

    Publication series

    NameProceedings - International Conference on Image Processing, ICIP
    Volume2017-September
    ISSN (Print)1522-4880

    Other

    Other24th IEEE International Conference on Image Processing, ICIP 2017
    Country/TerritoryChina
    CityBeijing
    Period17/9/1717/9/20

    Bibliographical note

    Funding Information:
    This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2016R1A2B4012865).

    Publisher Copyright:
    © 2017 IEEE.

    Keywords

    • Ambient light
    • Gamma tone mapping
    • Low gray-level region
    • OST display
    • Visibility enhancement

    ASJC Scopus subject areas

    • Software
    • Computer Vision and Pattern Recognition
    • Signal Processing

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