小波变换视域下CDMA图像盲水印算法研究  

A Blind CDMA Image Watermarking Algorithm Based on the Wavelet Transform

作　　者：马洁[1] 何映思[2] 

机构地区：[1]重庆第二师范学院,重庆400067 [2]西南大学计算机与信息科学学院,重庆400715

出　　处：《湘潭大学自然科学学报》2013年第2期90-93,共4页Natural Science Journal of Xiangtan University

基　　金：中国博士后科学基金项目;重庆市高等学校优秀人才支持计划

摘　　要：该文提出了一种盲扩展谱水印算法,在小波分解的多层图像中通过嵌入的方式将水印信息放置于其系数中,再将图像小波变换的结构进行客观的分析,把信息同构拓展谱加入到HL与LH的子带中,在水印的鲁棒性与透明性中,通过将噪声视觉函数进行加入,从而进行了平衡,提高了信息隐藏的安全性.并运用CDMA理论对于水印忙提取进行了有效的实现.在研究分析中发现,该方法用于普通的图像处理有着非常好的效果,特别是在JPEG图像的压缩中和噪声的多重攻击中鲁邦效果非常好.This paper presents a blind spread spectrum watermarking algorithm, the wavelet decomposi- tion multilayer image embedded watermark information is placed in its coefficient, objective analysis of the structure of the wavelet transform, the information is isomorphic to expand the spectrum was added to the HL and LH sub-band, in the robustness of the watermark and the transparent, through the visual functions of the noise is added, thereby performing a balance, improve the security of information hiding. And CDMA theoretical the extracted watermark busy work effectively to achieve. Analysis of the study found that the method used for common image processing has a very good effect, especially in the JPEG image compression and noise of multiple attacks Lupin has very good results.

关 键 词：数字水印 噪声视觉函数 CDMA水印 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]