一种高检测率用于彩色图像完整性证明的脆弱盲水印  

Fragile Blind Watermarking of High Detection Rate for Color Image Integrity Authentication

作　　者：刘伟[1] 王凤英[2] 

机构地区：[1]莱芜职业技术学院,山东莱芜271100 [2]山东理工大学,山东淄博255049

出　　处：《微电子学与计算机》2011年第7期209-212,共4页Microelectronics & Computer

基　　金：山东自然科学基金项目(Y2007G28);莱芜职业学院基金项目

摘　　要：提出了一种高检测率的用于彩色图像完整性证明的脆弱盲水印算法.将原始图像R、G、B色彩分量图像分块,对各分块进行一次整数小波变换;将小波系数经函数处理后映射为混沌初值,经过迭代、量化生成二值水印信息,然后随机嵌入到小波变换域.本算法利用混沌系统对初值极端敏性特点增强了水印信息的安全性,提高了脆弱水印的敏感性.A fragile blind watermarking algorithm of high detection rate for color image integrity authentication was proposed.Firstly,we divided the R、G、B components of image into some blocks,operated integer wavelet transform for each block once,and changed wavelet coefficients through function mapping into the initial value of chaos.The watermark information was obtained by iterating of chaos and quantifying the chaos sequence.At last,we embedded the watermark information into wavelet transform domain randomly.The algorithm improved safety of watermark information and sensitivity of fragile watermarking.

关 键 词：彩色图像 脆弱水印 完整性证明 混沌映射 整数小波变换 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]