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  • Automatic estimation of the corneal limbus in videokeratoscopy

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    20769.pdf (890.4Kb)
    Author(s)
    Morelande, MR
    Iskander, DR
    Collins, MJ
    Franklin, R
    Griffith University Author(s)
    Iskander, Robert
    Year published
    2002
    Metadata
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    Abstract
    An algorithm for estimating the corneal limbus from videokeratoscopic images is proposed. After the image is transformed to a polar grid, a novel edge-detection procedure, suitable for the detection of the soft edge produced by the limbus, is used to locate the limbus. Outliers due to the eyelids, eyelashes, and videokeratoscopic rings are removed by taking advantage of the approximate circularity of the cornea. An ellipse which minimizes the sum of the squared algebraic errors is fitted to the remaining edge points. Comparisons between the proposed algorithm, a manual computer-based technique and an algorithm which uses ...
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    An algorithm for estimating the corneal limbus from videokeratoscopic images is proposed. After the image is transformed to a polar grid, a novel edge-detection procedure, suitable for the detection of the soft edge produced by the limbus, is used to locate the limbus. Outliers due to the eyelids, eyelashes, and videokeratoscopic rings are removed by taking advantage of the approximate circularity of the cornea. An ellipse which minimizes the sum of the squared algebraic errors is fitted to the remaining edge points. Comparisons between the proposed algorithm, a manual computer-based technique and an algorithm which uses conventional edge-detection techniques demonstrate the accuracy of the proposed algorithm.
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    Journal Title
    IEEE Transactions on Biomedical Engineering
    Volume
    49
    Issue
    12
    DOI
    https://doi.org/10.1109/TBME.2002.805481
    Copyright Statement
    © 2002 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
    Subject
    Biomedical engineering
    Publication URI
    http://hdl.handle.net/10072/6941
    Collection
    • Journal articles

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