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:	詹啟祥;Chan, Chi-Shiang
貢獻者:	資訊多媒體應用學系
關鍵詞:	digital watermark, principal component analysis.
日期:	2003
上傳時間:	2012-11-26 07:12:09 (UTC+0)
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 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.
關聯:	INFORMATICA
顯示於類別:	[行動商務與多媒體應用學系] 期刊論文

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