离散小波变换(DWT)域的公有水印技术研究  

Research on the Public Watermarking Technology Based on DWT

作　　者：李陶深[1] 文志强[2] 兰红星[2] 陈松乔[2] 

机构地区：[1]广西大学计算机与电子信息学院,广西南宁530004 [2]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《广西科学》2006年第4期342-345,共4页Guangxi Sciences

基　　金：国家自然科学基金项目(90104028);广西留学回国人员科学基金项目(桂科回0342001)资助

摘　　要：通过在现有的公有水印模型中引入混沌系统，提出一种新的基于离散小波变换（DWT）域的公有水印技术．该技术在水印嵌入时，由混沌系统生成水印序列，并在离散小波变换的低频子带上嵌入水印，保证了水印的鲁棒性．实验分析不同指数因子嵌入水印的性能，结果表明：当指数因子在0．1～0．2之间时，嵌入水印的鲁棒性能比较好．By introducing chaos system in existing public watermarking model, a new public watermarking technology based on DWT is proposed. While embedding watermarking, the watermarking sequences are produced by the chaos system ,and are embedded into the low frequent coefficient of DWT domain to guarantee the robustness of watermarking. In the experiment, the performance of watermark against attacks using the different index factors is analyzed and the experiment results show that the robustness of watermark is better when the value of index factor is between 0. 1 and 0.2.

关 键 词：公有水印 鲁棒性 离散小波变换 混沌序列 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]