一种小波域数字水印算法及其MATLAB仿真  

A Wavelet-Based Watermark for Digital Images and Its Realization by Means of MATLAB

作　　者：刘莎[1] 吴献超[1] 侯晓荣[1] 

机构地区：[1]宁波大学理学院,浙江宁波315211

出　　处：《计算机安全》2008年第10期14-17,共4页Network & Computer Security

摘　　要：该文提出了一种基于DWT域有意义二值图像数字水印的新算法。首先,利用Arnold变换对水印序列进行置乱,增强嵌入水印的安全性;再分别对原始图像和置乱后的水印进行离散小波变换,最后,在原始图像的中频子带图像中进行水印小波域的融合。试验结果表明,该算法嵌入的水印具有比较好的透明性和鲁棒性。In this paper,a novel meaning binary image digital watermarking algorithm based on DWT is proposed.At first,the Arnold transform is adopted to randomize the watermark sequence for the purpose of embedded-watermark’s security. Then respectively acting DWT on original images and the scrambling watermark,last acts wavelet-domain fusion at the original image of the middle frequencies.Experiment results show this algorithm of embedded watermarking had a better transparency and robustness.

关 键 词：数字水印 小波变换 不可见性 鲁棒性 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TP273[自动化与计算机技术—计算机科学与技术]