基于混沌加密的频率域数字图像水印算法  

An Image Digital Watermarking Algorithm Based on Chaotic Encryption

作　　者：王慧琴[1] 李人厚[1] 王志雄[1] 

机构地区：[1]西安交通大学系统工程研究所

出　　处：《计算机应用研究》2002年第1期71-73,共3页Application Research of Computers

摘　　要：提出了一种基于混沌加密的频率域数字图像水印新算法。将含有版权信息的二值图像作为水印 ,利用混沌密码对其进行加密 ,水印方案具有双重的安全性。利用人类视觉系统 (HVS)的特性 ,定义了视觉掩蔽函数 ,实现了水印在原始宿主图像小波域中的自适应嵌入 ,从而兼顾了水印的不可见性和鲁棒性。In this paper,a chaotic encrypted image digital watermarking algorithm based on DWT domain is proposed.Firstly,we design a binary image watermarking signal and encrypted it by a chaotic sequence cipher before it is embedded.Exploiting the excellent properties of the wavelet transform and some characteristics of Human Visual System(HVS),watermark is embedded into the middle frequency suband images of the original image in DWT domain.The experimental results show that the watermarks are invisible and robust against noise and commonly used imageprocessing methods such as Guassian,Salt,Pepper noise,JPEG,crop procession etc.

关 键 词：频率域 数字图像水印算法 混沌加密 版权保护 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] D923.41[自动化与计算机技术—计算机科学与技术]