基于小波_奇异值分解的数字水印新算法.pdfVIP

第27卷第 5期 计 算 机 应 用 研 究 Vo.l 27 No. 5 2010年5月 ApplicationResearch of Computers M ay 2010 ) * 1 1 1 1, 2 , , , ( 11澳门科技大学资讯科技学院, 澳门特别行政区; 21 清华大学 自动化系, 北京 100084) : 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 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 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 : 数字 印; Arnold变换; 离散小波分解; 离散余弦变换; 奇异值分解 : P391141 : A : 1001-3695( 2010) 05-1896-02 doi: 10. 3969 /j. issn. 1001-3695. 2010. 05. 083 D igitalw atermarking algorithm based on DW and SVD 1 1 1 1, 2 ZHOU Peng- ying, SHEN Lei, IAN X iao- lin , XIA Shao-wei ( 1. Faculty of Information Technology, M acau University of Science Technology, Macau, China; 2. Dep t. of utomation, Tsinghua University, Bejiing 100084, China) Ab stract: o protect copyrights of digitalproducts effectively, proposed a new scheme of digital mi agew atermarking based on the combination of discretew avelet transformation (DW ) and singular value decomposition( SVD) . he algorithm usedDW and SVD inherent characteristic fully, and decomposed the orig inal mi age to the subbands ofmultiODW , then applied SVD to transform some of subbands. he Arnold transformation could increase the security ofw atermark, and decomposed the gray- levelwatermark mi agew ith blocked-DC transform after beingA rnold scrambled. hen classifiedDC coefficients and inserted into the m iddle of third level of SVD of original mi age. he expermi entalbased on this algorithm demonstrates that the water- mark is invisible, and it is robust to the