基于混沌的图像复合置乱和多级信息隐藏算法  

Chaos-based image compound encryption and multi-level information-hiding algorithm

作　　者：王虹[1] 孙景[1] 

机构地区：[1]武汉理工大学信息工程学院,武汉430063

出　　处：《计算机工程与应用》2008年第3期67-69,共3页Computer Engineering and Applications

基　　金：湖北省自然科学基金( the Natural Science Foundation of Hubei Province of China under Grant No.20011j3013)

摘　　要：提出一种基于混沌映射和灰度替换的图像复合置乱算法,算法采用了一维logistic混沌序列对图像的行列分别置乱,并与灰度替换相结合,实验表明其具有较高的安全性。利用人眼视觉系统(HVS)的特性,提出一种新的基于DCT的信息隐藏算法,通过选取频域变换后的适当系数,调整其尾数的奇偶,达到嵌入秘密信息的目的,并将其扩展为基于其他变换域的多级信息隐藏技术,实验证明其具有隐藏量大、鲁棒性较强、盲提取的优点。This essay has brought forward one kind of the image compound encryption algorithm which is based on chaotic mapping and gray substitution,and have adopted one-dimension logistic chaotic sequences to confuse the image ranks respectively,and has combined with gray substitution.The algorithm possesses high security.An new DCT-based information-hiding algorithm is proposed by making use of Human Visional System’s（HVS） character,and choosing the appropriate modulus after image frequency region varies,adjusting it’s odd-even mantissa,to reach the purpose,and to expand it to multi-level information-hiding technology based on other varying region,the experiments testify it has possessed the merit of high capacity,strong robust and drawing blindly.

关 键 词：混沌 图像置乱 信息隐藏 盲提取 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构] TP309.2[自动化与计算机技术—计算机科学与技术]