基于人眼视觉特性的小波树量化水印  

Wavelet Tree Quantization Watermarking Based on Human Visual System

作　　者：胡玉平[1] 孙伟 石磊[1] 韩德志[1] 

机构地区：[1]华中科技大学计算机学院,湖北武汉430074 [2]驻马店师范专科学校,河南驻马店463000

出　　处：《小型微型计算机系统》2004年第8期1491-1494,共4页Journal of Chinese Computer Systems

基　　金：国防科工委预研项目 ( 15 -8-4 )资助 ;湖南省教育厅资助科研项目 ( 0 3 B0 3 3 )资助

摘　　要：在分析图像小波分解系数的树结构关系以及人眼视觉系统 (HVS)模型的基础上 ,提出了一种基于人眼视觉特性的小波系数树量化水印 ,该方法在宿主图像的两棵小波系数树中嵌入一位水印信息 ,通过量化使它们呈现足够大的统计差别从而使水印检测时能提取水印信息 .实验结果和分析表明 :该方法水印有较好的不可视性和鲁棒性 。The tree structure relation of wavelet coefficients and the model of human visual system is analysed at frist ,then an method of wavelet tree quantization watermarking based on Human Visual System is put forward. With this method,each watermark bit is embedded using two wavelet trees of host image,The trees are so quantized that they exhibit a large enough statistical difference which will later be used for watermark extraction.Experiment results and its anlaysis show the watermarking is invisible, robust and the checking probability of false positive error is very low in this proposed scheme.

关 键 词：数字水印 人眼视觉系统(HVS) 小波变换 量化 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]