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    題名: An Adaptive Reversible Image Watermarking Scheme Based on Integer Wavelet Coefficients
    作者: Chen, Chien-Chang;Jiun, Zeng-Chuang, Hsu, Chien-Hsiang
    貢獻者: 淡江大學資訊工程學系
    關鍵詞: Reversible image watermarking;integer wavelet transform;difference expansion;adaptive block size
    日期: 2013-07-01
    上傳時間: 2013-10-23 11:07:44 (UTC+8)
    出版者: Academy Publisher
    摘要: 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.
    關聯: Journal of Computers 8(7), pp.1677-1682
    DOI: 10.4304/jcp.8.7.1677-1682
    顯示於類別:[資訊工程學系暨研究所] 期刊論文

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