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A Watermarking Scheme Based on Principal Component Analysis Technique

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題名: A Watermarking Scheme Based on Principal Component Analysis Technique

作者: Ying-Hong Wang;Chih-Hao Lin

關鍵詞: digital watermark;principal component analysis 日期: 2005-05

上傳時間: 2010-04-21T02:55:50Z

摘要: 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

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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.

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