基于混沌加密和HVS在数字水印算法中的应用  

Improved Watermarking Algorithm Based on Chaotic Encryption and HVS

作　　者：穆晓慧[1] 叶汉民[1] 谭惠尹[1] 

机构地区：[1]桂林理工大学信息科学与工程学院,广西桂林541004

出　　处：《软件导刊》2011年第2期57-59,共3页Software Guide

摘　　要：针对混沌系统和人类视觉特性改进一种鲁棒性数字水印算法。原始图像经过离散小波变换提取子带系数,二值灰度数字水印图像信号在嵌入时经过Logistic混沌映射预处理,结合人眼视觉特性,水印图像嵌入到重要的子带系数中,实验证明该方案对常见的图像处理如噪声、剪切、旋转等攻击具有很好的鲁棒性。A blind robust digital image watermarking scheme using chaotic encryption and HVS in DWT domain is presented.The original image is transformed into some sub-band coefficients using discrete wavelet transformation（DWT）,and then the binary image watermark signal is encrypted using logistic chaos map before it is embedded.Taking into account the characteristics of human visual system（HVS）,the watermark is embedded into the important sub-band coefficients.The proposed scheme can achieve good robustness,which is demonstrated in the Experimental results show that the method is robust against the attacks of general image processing methods such as noise,cut,shear and so on.

关 键 词：数字水印 混沌映射 人类视觉特性 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]