基于混沌系统的脆弱性水印算法设计  

Fragile watermarking algorithm based on chaos system

作　　者：李睿[1] 李明[1] 张贵仓[2] 

机构地区：[1]兰州理工大学计算机与通信学院,甘肃兰州730050 [2]西北师范大学数学与信息科学学院,甘肃兰州730070

出　　处：《兰州理工大学学报》2007年第2期100-103,共4页Journal of Lanzhou University of Technology

基　　金：甘肃省自然科学基金(3ZS042-B25-007);甘肃省科技攻关项目(IGS035-A052-011)

摘　　要：提出了一种新的脆弱性数字水印方案,原始图像不重叠分块后求取各块的灰度平均值,然后利用混沌系统首先对其进行混沌映射,再对其用二值映射函数映射为二值序列后作为水印信息嵌入到载体图像的LSB位平面中.实验结果表明,论文提出的方案有很好的篡改定位能力和安全性.A scheme of fragile digital watermarking was proposed, where the original image was divided first into segments without overlaps, then the mean value of gray level of all segments was calculated, respectively, further they were chaotically mapped with chaos system, and finally they were transformed into hi-value array with hi-value mapping function as watermarking messages to be embedded into the LSB bitplane of bearing images. The result of experiments showed that the scheme presented possessed an excellent ability of image location with juggling actions and high security as well.

关 键 词：数字水印 脆弱 混沌系统 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]