A 3-D Transformation to Improve the Legibility of License Plate Numbers

    Volume 47, Issue 3 (May 2002)

    ISSN: 0022-1198

    CODEN: JFSOAD

    Published Online: 1 May 2002

    Page Count: 8


    Yu, C-C
    Central Police University, Taoyuan,

    Wen, C-Y
    Central Police University, Taoyuan,

    Hun, Z-D
    Central Police University, Taoyuan,

    (Received 16 October 2001; accepted 30 September 2001)

    Abstract

    In this paper, a novel three-dimensional transformation method for vehicle license plate number recognition is proposed. This method provides an efficient solution to normalize skew distorted vehicle license plate images. The Hough transform is used to estimate the license plate position and the normalization angle. After the three-dimensional transformation and normalization processes, the vehicle license plate numbers are recognized easily. Real vehicle license plate images are used to show the capability of the proposed method. The provided method is also useful for other skewed writings, such as the text printed on a suspect's shirt.


    Paper ID: JFS15298J

    DOI: 10.1520/JFS15298J

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    Title A 3-D Transformation to Improve the Legibility of License Plate Numbers
    Symposium , 0000-00-00
    Committee E30