一种基于小波变换和图像置乱的水印算法  

A New Watermark Algorithm Based on Wavelet Transform and Scrambling

作　　者：陈历红[1,2] 陈刚[1,2] 赵晓宇[1,2] 李均利[1,2] 

机构地区：[1]浙江大学计算机图像图形研究所,杭州310027 [2]宁波大学数字技术和应用软件研究所,宁波315211

出　　处：《计算机工程与应用》2004年第35期44-46,57,共4页Computer Engineering and Applications

基　　金：国家自然科学基金(编号:60302012);宁波市重点博士基金(编号:2003A61006)资助

摘　　要：论文给出了一种新的基于小波变换和图像置乱的水印算法。先将要嵌入到数字产品中的数字水印图象进行置乱,然后用基于小波域的算法将其嵌入到数字产品中。这样可以有效地抵抗裁减攻击,并且对提取的水印图像,可以使用确定噪声点的滤波算法进行改善,试验效果令人满意。In recent years,digital watermarking has been widely used in copyright protection for digital images.The paper gives a new watermark algorithm based on wavelet transform and scrambling.Firstly,it introduces how to realize digital image scrambling.Secondly,a method of embedding the watermark in digital images base d on the discrete wavelet transform is proposed.Moreover,experimental results have proved that the method is robust enough to some image degradation process such as cropping and sharpening etc.The simulation results are shown.

关 键 词：图像置乱 水印算法 小波变换 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]