基于余弦变换和小波变换的数字水印算法  

A Kind of algorithm of digital watermarking based on discrete wavelet transform and discrete cosine transform

作　　者：郑兆顺[1] 李江涛[1] 

机构地区：[1]濮阳职业技术学院数学与信息工程系

出　　处：《微计算机信息》2007年第18期291-293,共3页Control & Automation

摘　　要：在互联网络技术和多媒体技术普及的今天,数字水印技术已经成为目前信息安全技术领域的一个重要方向。本文提出了一种基于离散余弦变换和离散小波变换的数字水印算法,以一个长度为n服从N(0,1)正态分布的随机数序列作为水印信号嵌入到图像最具感知意义的频率部分。实验结果表明,此算法具有良好的视觉效果和鲁棒性。With the development at full speed of Internet technology and multimedia technology, digital watermarking technology has already beeome a new direetion of the safe praetiee field of information at present. This paper has put forward a kind of digital watermark algorithm based on diserete wavelet transform and diserete eosine transform, Obey length for n, N（ 0, 1） the random several sequenee of normal distribution is watermark signal built-in have the frequeney part of pereeption meaning to image, test result to show, this algorithm have good visual effeet and anti-interferenee.

关 键 词：数字水印 离散小波变换 离散余弦变换 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]