基于小波变换和奇异值分解的数字水印算法  

A New Digital Watermarking Algorithm Based on DWT and SVD

作　　者：刘泊[1] 吕鑫磊[2] 王杰[1] 

机构地区：[1]哈尔滨理工大学测控技术与通信工程学院,黑龙江哈尔滨150080 [2]中国石油天然气股份有限公司大庆石化分公司,黑龙江大庆163714

出　　处：《哈尔滨理工大学学报》2010年第4期6-9,共4页Journal of Harbin University of Science and Technology

摘　　要：数字水印技术是一种新的数字媒体保护措施,它是将特定的信息嵌入到图像、语音、视频及文本文件等各种数字媒体中,以达到标识、注释及版权保护等目的.本文提出一种基于DWT和SVD相结合的数字水印算法,首先对混沌置乱后的水印奇异值分解,然后将水印的奇异值嵌入到原始图像的小波变换系数中.实验结果显示:其对一般的常见攻击和几何攻击等均具有良好的鲁棒性.Digital watermark technology is a new kind of protection measure of digital media,which inserts special information into some digital medium such as image,voice,video and text files in order to protect identifier,remark and copyright.This paper proposed a watermarking algorithm based on discrete wavelet transform（DWT） ofimage and singular valued composition（SVD）.The original image is decomposed with DWT,the watermarking image is decomposed with SVD after chaotic scrambling,and then the singular values of watermarking are embedded into some coefficients of decomposed original image.Experiment results confirm that the proposed watermarking algorithm is robust to common attack and geometric attack,etc.

关 键 词：数字水印 离散小波变换 奇异值分解 混沌置乱 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]