基于CL多小波变换的自适应数字水印算法  

An adaptive digital watermarking algorithm based on CL multi-wavelet transformation

作　　者：谢小贤[1] 舒志彪[1] 

机构地区：[1]福州大学数学与计算机科学学院,福建福州350002

出　　处：《福州大学学报（自然科学版）》2004年第z1期55-59,共5页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省教育厅科研资助项目(K99029)

摘　　要：根据CL多小波的特点,提出了一种把视觉系统掩蔽特性结合到水印编码过程中的基于CL多小波域的自适应数字水印算法.首先利用小波系数的树结构关系对最低分辨率子图像的第一分量进行分类,然后根据分类的结果将不同强度的水印分量嵌入到这些小波系数中.实验结果表明,该水印系统具有良好的透明性和鲁棒性.According to the characteristics of CL multi-wavelet and the feature of visual masking of human vision system, an adaptive digital watermarking algorithm based on CL multi-wavelet domain is proposed in this paper. Using the tree structure relation of wavelet coefficients, the first component coefficients of the lowest resolution sub-image are classified into two groups. Based on the results of classification, watermark components with different strength are embedded into these wavelet coefficients. Experimental results indicate that the performance of the proposed watermarking is invisible and robust.

关 键 词：数字水印 CL多小波 鲁棒性 视觉掩蔽 算法 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]