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    NTHUR > College of Electrical Engineering and Computer Science > Department of Electrical Engineering > EE Conference Papers >  Under-exposed image enhancement using exposure compensation

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    Title: Under-exposed image enhancement using exposure compensation
    Authors: Chen-Jui Chung;Wei-Yao Chou;Chia-Wen Lin
    Teacher: 林嘉文
    Date: 2013
    Publisher: Institute of Electrical and Electronics Engineers
    Relation: 2013 13th International Conference on ITS Telecommunications (ITST), Tampere, 5-7 Nov. 2013, Pages 204 - 209
    Keywords: image enhancement
    nighttime image processing
    onboard camera
    surveillance system
    Abstract: Exposure is critical in the imaging process, since if the lighting condition is poor, the quality and visibility of images will be severely degraded. In this paper, we propose a fully automatic image enhancement algorithm that can efficiently solve the under-exposed problem. The basic idea behind this method comes from the common technique of photography: the exposure compensation. For poorly exposed images like nighttime images and backlit images, we first examine the level of exposure by adapting the Zone system used in photography, and then use exposure compensation to correct the insufficient lightness. Our experiments demonstrate compared to existing methods, the proposed algorithm not only presents more nature color and visible details, but also leads to less unpleasing artifacts. It is particularly useful for image quality enhancement for a video recorded by event data recorder (EDR) or by a video-based driving assistance system in a vehicle.
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    Appears in Collections:[Department of Electrical Engineering] EE Conference Papers
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