A Watermarking Scheme Based on Principal Component Analysis Technique

ASIAIR > College of Computer Science > Department of Applied Informatics and Multimedia > Journal Article > Item 310904400/19013

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 07:12:09 (UTC+0)
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:	[Department of Applied Informatics and Multimedia] Journal Article

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