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    Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/19013

    Title: A Watermarking Scheme Based on Principal Component Analysis Technique
    Authors: 詹啟祥;Chan, Chi-Shiang
    Contributors: 資訊多媒體應用學系
    Keywords: digital watermark, principal component analysis.
    Date: 2003
    Issue Date: 2012-11-26 15:12:09 (UTC+8)
    Abstract: . In this paper, we shall propose a new method for the copyright protection of digital images.
    To embed the watermark, our new method partitions the original image into blocks and uses
    the PCA function to project these blocks onto a linear subspace. There is a watermark table, which
    is computed from projection points, kept in our new method. When extracting a watermark, our
    method projects the blocks of the modified image by using the PCA function. Both the newly projected
    points and the watermark table are used to reconstruct the watermark. In our experiments,
    we have tested our scheme to see how it works on original images modified by JPEG lossy compression,
    blurring, cropping, rotating and sharpening, and the experimental results show that our
    method is very robust and indeed workable.
    Relation: INFORMATICA
    Appears in Collections:[行動商務與多媒體應用學系] 期刊論文

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