基于小波变换和奇异值分解的盲水印算法  

Blind Digital Watermarking Algorithm Based on Discrete Wavelet Transform and Singular Value Decomposition

作　　者：周万府[1] 

机构地区：[1]楚雄师范学院信息科学与技术学院,云南楚雄675000

出　　处：《楚雄师范学院学报》2015年第6期42-44,共3页Journal of Chuxiong Normal University

摘　　要：小波变换具有良好的时频特性,图像的奇异值具有良好的内蕴性和稳定性,本文基于小波变换和奇异值分解提出了一种盲水印算法。算法通过二级小波变换、低频子带分块、分块奇异值分解、根据水印信息修改最大奇异值实现水印嵌入;并通过其逆过程实现水印提取。经仿真实验表明,该算法能够实现水印的嵌入和盲提取,具有良好的视觉不可见性和鲁棒性。Wavelet transform has good time - frequency characteristics, the singular values of the image has good connotation and stability, based on the wavelet transform and singular value decomposition proposes a blind watermarking algorithm. Algorithm is through the secondary wavelet transform, the lowfrequency sub -band block decomposition, block singular value decomposition, according to the modify the maximum gorithm can achieve singular value, and extracts the watermark by its the watermark embedding and blind extracting. watermark embedding watermark information to inverse. The simulation results show that the al- is has good invisibility and robustness.

关 键 词：小波变换 奇异值分解 盲水印 

分 类 号：O177.6[理学—数学]