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	Wavelet based full-scale adaptive digital watermark algorithm
	Shan Hao ; Ma Jianwei ; Yang Huizhu
	2010-10-12 ; 2010-10-12
关键词	Practical Theoretical or Mathematical Experimental/ data compression image coding image resolution trees (mathematics) watermarking wavelet transforms/ full-scale adaptive digital watermark algorithm image embedding scheme counterattack tortuous crime Mallat wavelet decomposition image robustness multiresolutional wavelet tree characteristics weight factor JPEG loss compression/ B6135C Image and video coding B0230 Integral transforms B0250 Combinatorial mathematics C5260B Computer vision and image processing techniques C6130S Data security C1130 Integral transforms C1160 Combinatorial mathematics
中文摘要	A scheme of embedding high capability digital watermark in images was developed using a multiple scales method to follow the development of high capability watermark and counterattack tortuous crimes. Under the framework of Mallat wavelet decomposition and based on high frequency significant coefficients, the algorithm realizes full-scale embedding and simultaneously increases the embedding bits and image robustness by taking advantages of the multi-resolutional characteristics of the wavelet tree. The extracting scheme detects watermark by embedding positions and weighting factor associated with the full-scale information for conditions of JPEG loss compression, blurring, sharpening and geometric distortions (i. e., cropping and affine transform). Comparisons between the original and processed images and watermarks by means of PSNR and correlation coefficients show that this algorithm outstands other methods in full-scale embedding, observably increased embedding bits, and excellent trade-off between transparency and robustness. Experimental results also show the large embedded information content, the imperceptibility for the human vision system, neat and intact extracted watermarks, and the robustness against various attacks.
语种	中文
出版者	Tsinghua University Press ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/78991]
专题	清华大学
推荐引用方式 GB/T 7714	Shan Hao,Ma Jianwei,Yang Huizhu. Wavelet based full-scale adaptive digital watermark algorithm[J],2010, 2010.
APA	Shan Hao,Ma Jianwei,&Yang Huizhu.(2010).Wavelet based full-scale adaptive digital watermark algorithm..
MLA	Shan Hao,et al."Wavelet based full-scale adaptive digital watermark algorithm".(2010).

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