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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/92818


    Title: An Adaptive Reversible Image Watermarking Scheme Based on Integer Wavelet Coefficients
    Authors: Chen, Chien-Chang;Jiun, Zeng-Chuang, Hsu, Chien-Hsiang
    Contributors: 淡江大學資訊工程學系
    Keywords: Reversible image watermarking;integer wavelet transform;difference expansion;adaptive block size
    Date: 2013-07-01
    Issue Date: 2013-10-23 11:07:44 (UTC+8)
    Publisher: Academy Publisher
    Abstract: This paper presents an integer wavelet coefficients based reversible image watermarking scheme. A reversible image watermarking approach extracts the embedded watermarks from a watermarked image and recovers the watermarked image to the original image simultaneously. The proposed approach first applies the host image to 3-layered integer wavelet transform. Nine subimages are acquired from the 3-layered integer wavelet transform. Each subimage is then segmented to blocks of size 2LX2L, where L is determined by structure of the subimage. Then, reversible watermarks are embedded into differences between central ordered pixel and other pixels in each block. Largest difference in each block determines the embedded quantity in each difference. Experimental results show that the proposed adaptive block size scheme has higher capacity and quality ratio than previous works.
    Relation: Journal of Computers 8(7), pp.1677-1682
    DOI: 10.4304/jcp.8.7.1677-1682
    Appears in Collections:[資訊工程學系暨研究所] 期刊論文

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