基于DWT和SVD的鲁棒零水印算法  

A Robust Zero-watermarking Algorithm Based on DWT and SVD

作　　者：王利彬 王树梅[1] WANG Libin;WANG Shumei(School of Computer Science and Technology,Jiangsu Normal University,Xuzhou 221116,China)

机构地区：[1]江苏师范大学计算机科学与技术学院,江苏徐州221116

出　　处：《湖南理工学院学报（自然科学版）》2023年第4期35-38,共4页Journal of Hunan Institute of Science and Technology(Natural Sciences)

摘　　要：为了解决传统水印算法需要平衡鲁棒性和不可见性矛盾的问题,提出一种用DWT和SVD构造零水印算法的方案.利用SVD分解后U、V矩阵第一个列向量被攻击后具有稳定性的特点,采用DWT使低频区域能量集中,再使用SVD分解获取U、V矩阵.通过比较U、V矩阵第一列向量的方式保证了水印的鲁棒性.同时对数字水印进行Arnold变换,既可隐藏水印信息,又可提高水印信息的安全性.由于算法采用零水印方式,故拥有良好的不可见性.实验结果表明,该算法拥有较高的鲁棒性,并且简单易行.In order to solve the problem that traditional watermarking algorithms need to balance the contradiction between robustness and invisibility,a scheme for constructing zero watermarking algorithms with DWT and SVD is proposed.Using the stability of the first column vectors of the U and V matrices after SVD decomposition,DWT is used to concentrate the energy in the low-frequency region,and then SVD decomposition is used to obtain the U and V matrices.The robustness of the watermark is ensured by comparing the first column vectors of the U and V matrices.At the same time,the Arnold transform is applied to the digital watermark,which can both hide the watermark information and improve the security of the watermark information.Since the algorithm adopts zero watermarking,it has good invisibility.The experimental results show that the algorithm has high robustness and is simple and easy to implement.

关 键 词：零水印 离散小波变换 奇异值分解 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]