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    Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/9006


    Title: A Watermarking Scheme Based on Principal Component Analysis Technique
    Authors: Ying-Hong Wang;Chih-Hao Lin
    Keywords: digital watermark;principal component analysis
    Date: 2005-05
    Issue Date: 2010-04-21 10:55:50 (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: International Journal of Distance Education Technologies 6(4) : 14-33
    Appears in Collections:[行動商務與多媒體應用學系] 期刊論文

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