基于奇异值分解的小波域水印算法  

Watermarking Algorithm of Wavelet Domain Based on Singular Value Decomposition

作　　者：王选宏[1] 肖云[2] 

机构地区：[1]西安邮电学院,陕西西安710121 [2]西北大学信息科学与技术学院,陕西西安710127

出　　处：《现代电子技术》2010年第5期86-88,共3页Modern Electronics Technique

基　　金：陕西省教育厅自然科学专项项目(08JK449);西安邮电学院中青年科研基金资助项目(ZL2008-19)

摘　　要：结合奇异值分解(SVD)和离散小波变换(DWT)的特点,提出一种基于SVD的小波域数字图像水印算法。该算法将二值水印图像经过取反置乱后嵌入到原始图像小波中频子带的奇异值中,具有较高的抗攻击能力。仿真实验证明,该算法不仅具有良好的透明性,而且对常见攻击,如:叠加噪声、JPEG压缩、滤波及几何攻击具有较好的鲁棒性。A new watermarking algorithm for digital image based on DWT and SVD is proposed in this paper,which combines both merits of Discrete Wavelet Transform（DWT） and Singular Value Decomposition（SVD）. In the algorithm, binary image is scrambled and reversed, then it is embedded in the singular value of intermediate frequency sub - band of the gray image DWT. This algorithm is robust against attacks. Experimental results show that the new watermarking scheme has a good transparence of embedded watermark image and robust against attacks such as superposition noise, filtering, JPEG compression and geometric distortion.

关 键 词：数字水印 离散小波变换 奇异值分解 鲁棒性 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]