DWT和SVD相融合的彩色图像水印算法  

Color Image Watermarking Based on Discrete Wavelet Transform and Singular Value Decomposition

作　　者：褚静[1] 徐安成[1] 张美凤[1] 

机构地区：[1]常州工学院光电工程学院,江苏常州213002

出　　处：《电视技术》2013年第17期29-32,共4页Video Engineering

基　　金：常州工学院自然科学研究基金项目(YN0928)

摘　　要：为加强数字多媒体的版权保护,提出了一种结合离散小波变换和奇异值分解相融合的彩色图像水印算法(DWTSVD)。首先对彩色数字载体图像进行小波分解,并对其小波系数进行奇异值分解;然后对水印信息采用Arnold进行置乱,并进行奇异值分解;最后将水印信息的奇异值嵌入到彩色图像的小波系数奇异值中,并对水印嵌入强度进行调节。仿真结果表明,DWT-SVD可以检测到完整的水印信息,具有良好的不可见性,对各种攻击具有较强的鲁棒性。In order to strengthen the digital multimedia copyright protection, a color image watermarking algorithm by combination of discrete wavelet transform and singular value decomposition （DWT-SVD） is put forward in this paper. The color digital images are decomposed by wavelet transform, and the wavelet coefficients are decomposed by singular value decomposition; then the watermark information is scrambled by the Arnold algorithm and is decomposed singular value decomposition. Finally the watermark singular values are embedded into the color image wavelet coefficients singular value, and the watermark embedding strength is adjusted. The simulation results show that the proposed algorithm can detect the watermark information well, and has good invisibility, and has strong robustness for all kinds of attacks.

关 键 词：彩色图像 数字水印 离散小波变换 奇异值分解 

分 类 号：TN911.73[电子电信—通信与信息系统] TP391[电子电信—信息与通信工程]