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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/55162


    Title: Adaptive reversible image watermarking scheme
    Authors: Chen, Chien-Chang;Tsai Yao-Hong
    Contributors: 淡江大學資訊工程學系
    Keywords: Reversible watermarking;Difference embedding;Adaptive block size;LSB
    Date: 2011-03
    Issue Date: 2013-06-13 11:29:38 (UTC+8)
    Publisher: New York: Elsevier Inc.
    Abstract: 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.
    Relation: Journal of Systems and Software 84(3), pp.428-434
    DOI: 10.1016/j.jss.2010.11.891
    Appears in Collections:[資訊工程學系暨研究所] 期刊論文

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