提升方案小波和DCT下的图像盲水印算法  

A Blind Image Watermarking Algorithm Based on Lifting Scheme Wavelet and DCT

作　　者：楼偶俊[1] 王相海[1] 

机构地区：[1]辽宁师范大学计算机与信息技术学院,大连116029

出　　处：《计算机辅助设计与图形学学报》2005年第4期846-851,共6页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家自然科学基金(60372071);辽宁省自然科学基金(20032105);辽宁省高等学校优秀人才支持计划;大连市科技基金

摘　　要：在研究HVS对图像掩蔽特性的基础上,提出一种基于提升方案小波和DCT的彩色图像盲水印算法首先将宿主图像亮度分量进行基于提升方案的小波分解,然后对其较低频子带进行基于分块的DCT分解,最后将二值图像的水印信息嵌入到各分块DCT域的中频系数中文中算法结合HVS的掩蔽特性,使得水印信息的嵌入能量具有自适应的特性,从而保证了所嵌入的水印在不可见性的前提下。Digital watermark technique is one of the most active research topics in the safety field of multimedia information. On the basis of research on invisibility of HVS for the image, this paper proposes a blind image watermarking algorithm based on lifting scheme wavelet and DCT. Its main ideas are as follows: (1) analyzing the luminance component of the host image by lifting scheme wavelet; (2) dividing the lower frequency subband into blocks and transforming every block by DCT into a coefficient block; (3) embedding the watermarking information of binary image into the middle frequency region of the coefficient block together with the invisibility of HVS. Because of using the invisibility of HVS, the algorithm makes the embedded watermarking energy in the coefficient block adaptable. The algorithm possesses very strong robustness for some common image processing operations. Simulation results show the feasibility of the method.

关 键 词：数字水印 提升方案小波变换 DCT HVS 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]