Adaptive reversible image watermarking scheme

淡江大學機構典藏 > 工學院 > 資訊工程學系暨研究所 > 期刊論文 > Item 987654321/55162

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题名:	Adaptive reversible image watermarking scheme
作者:	Chen, Chien-Chang;Tsai Yao-Hong
贡献者:	淡江大學資訊工程學系
关键词:	Reversible watermarking;Difference embedding;Adaptive block size;LSB
日期:	2011-03
上传时间:	2013-06-13 11:29:38 (UTC+8)
出版者:	New York: Elsevier Inc.
摘要:	This paper presents an adaptive block sized reversible image watermarking scheme. A reversible watermarking approach recovers the original image from a watermarked image after extracting the embedded watermarks. Without loss of generality, the proposed scheme segments an image of size 2N × 2N adaptively to blocks of size 2L × 2L, where L starts from a user-defined number to 1, according to their block structures. If possible, the differences between central ordered pixel and other pixels in each block are enlarged to embed watermarks. The embedded quantity is determined by the largest difference in a block and watermarks are embedded into LSB bits of above differences. Experimental results show that the proposed adaptive block size scheme has higher capacity than conventional fixed block sized method.
關聯:	Journal of Systems and Software 84(3), pp.428-434
DOI:	10.1016/j.jss.2010.11.891
显示于类别:	[資訊工程學系暨研究所] 期刊論文

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