一种基于HVS的利用零树编码的水印算法  

Digital watermarking algorithm based on human visual systemby zero tree coding

作　　者：宋琪[1] 吴林东[1] 朱光喜[1] 容太平[1] 

机构地区：[1]华中科技大学电子与信息工程系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2004年第5期5-7,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目 ( 60 3 0 2 0 0 4)

摘　　要：提出了一种利用人类视觉特性的数字图像水印算法 .先采取直接序列扩展方式生成水印序列信号 ,然后嵌入到一组按重要性选出的小波系数中 ,其中嵌入强度由小波域临界可见误差JND(JustNoticedDiffer ence)门限决定 .实验证明此算法在水印的不可见性和鲁棒性之间取得了良好的平衡 ,既保证了人眼视觉的不可察觉性 ,又具有较好的鲁棒性 .A digital watermarking method based on human visual system was proposed. The original watermark sequence was extended to produce the embedded watermark signals. The watermark signals were embedded into a set of wavelet coefficients selected according to their importance and the embedding intension was decided by just noticed difference (JND) threshold in wavelet domain. The experimental result proved that the invisibility of watermark and its robustness could be well compromised. This algorithm ensures the invisibility of human vision and the robustness to some common attacks.

关 键 词：数字水印 小波变换 人眼视觉系统 临界可见误差 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]