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基于小波—奇异值分解的数字水印新算法*
引用本文:周鹏颖,沈磊,田小林,夏绍玮.基于小波—奇异值分解的数字水印新算法*[J].计算机应用研究,2010,27(5):1896-1897.
作者姓名:周鹏颖  沈磊  田小林  夏绍玮
作者单位:1. 澳门科技大学,资讯科技学院,澳门特别行政区
2. 澳门科技大学,资讯科技学院,澳门特别行政区;清华大学,自动化系,北京,100084
基金项目:澳门科技发展基金资助项目(003/2009/A)
摘    要:为了有效地保护数字作品的版权,提出了一种以离散小波多级分解与奇异值分解相结合的数字水印新算法。该算法充分利用小波与奇异值的固有性质,对原始图像进行多级小波分解,并对部分子带作奇异值分解。将水印置乱来保证一定的安全性,再对其进行分块离散余弦变换,然后将它嵌入到中间奇异值及其周围的部分矩阵块中。实验表明,该方法不仅有较好的透明性,而且能抗大多数处理攻击,有较好的鲁棒性。

关 键 词:数字水印    Arnold变换    离散小波分解    离散余弦变换    奇异值分解

Digital watermarking algorithm based on DWT and SVD
ZHOU Peng-ying,SHEN Lei,TIAN Xiao-lin,XIA Shao-wei.Digital watermarking algorithm based on DWT and SVD[J].Application Research of Computers,2010,27(5):1896-1897.
Authors:ZHOU Peng-ying  SHEN Lei  TIAN Xiao-lin  XIA Shao-wei
Affiliation:(1.Faculty of Information Technology, Macau University of Science & Technology, Macau, China; 2.Dept.of Automation, Tsinghua University, Beijing 100084, China)
Abstract:To protect copyrights of digital products effectively, proposed a new scheme of digital image watermarking based on the combination of discrete wavelet transformation (DWT) and singular value decomposition(SVD). The algorithm used DWT and SVD inherent characteristic fully, and decomposed the original image to the subbands of multi-DWT, then applied SVD to transform some of subbands. The Arnold transformation could increase the security of watermark, and decomposed the gray-level watermark image with blocked-DCT transform after being Arnold scrambled. Then classified DCT coefficients and inserted into the middle of third level of SVD of original image. The experimental based on this algorithm demonstrates that the watermark is invisible, and it is robust to the common signal processing technology.
Keywords:digital watermarking  Arnold transformation  discrete wavelet transformation  discrete cosine transformation  singular value decomposition  
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