小波变换结合纠错编码的半透明数字水印  

Translucent Digital Watermark Base on Wavelets and Error-Correct Code

作　　者：罗永[1] 成礼智[1] 吴翊[1] 徐志宏[1] 

机构地区：[1]国防科学技术大学理学院,长沙410073

出　　处：《计算机学报》2004年第11期1533-1539,共7页Chinese Journal of Computers

基　　金：国家自然科学基金 (10 17110 9);教育部博士点基金 (2 0 0 499980 0 6)资助 .

摘　　要：该文结合实际应用需要提出了半透明数字水印的概念 ,并研究了带参数的双正交整数小波的构造 .结合带参数的整数小波变换与纠错编码设计了一种半透明数字水印 .带参数整数小波的使用 ,提高了水印的安全性 .根据小波域量化噪声自适应地确定嵌入强度 ,并结合纠错编码 ,提高了抗攻击能力 .实验表明该算法有较强的抗JPEG压缩和图像处理的能力 .This paper advances a concept of Translucent Digital Watermark based on practical application, and presents a technique to construct the bi-orthogonal integer wavelets with parameter. It was combined with integer wavelets with parameter and error-correct code to design a translucent digital watermark. Integer wavelets with parameter increase security. The strength of the embedded watermark is image-adaptive according to the wavelets quantization noise, and combined with the error-correct code, it improved the characteristic to anti-attack. The simulation results show its effectivity in resisting compression of JPEG and image processing.

关 键 词：图像水印 图像半透明数字水印 带参数整数小波变换 纠错编码 抗JPEG压缩 图像处理 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]