一种基于二维混沌映射的三角形图像信息隐藏方案  

Triangular Algorithm of Image Data Hiding Based on Two-dimensional Chaotic Map

作　　者：冯志杰[1] 王红梅[1] 

机构地区：[1]青岛滨海学院教务处,山东青岛266555

出　　处：《山东科技大学学报（自然科学版）》2014年第5期63-69,共7页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：山东省高等学校科技计划项目(J09LG67)

摘　　要：针对空域图像信息隐藏技术容易出现高失真、频域图像信息隐藏技术藏量偏小的问题,提出一种基于二维混沌映射的三角形隐藏方案。首先,利用二维Baker映射对秘密图像的像素位置进行置乱,使其能量在频谱上分布趋向均匀,其优点是用统计方法不易检测出隐藏信号,更有利于信息的隐藏;然后,通过探索秘密图像块和覆盖图像块的关系进行块匹配,构建一个直角三角形,找出其差异,生成密钥,并将秘密图像信息嵌入到覆盖图像中。实验结果表明:该方案实现了双重加密,增加了破解难度,具有较大的密钥空间,伪装图像的逼真度高,可以加密任意尺寸的图像,能够快速实现。To solve the problem of high distortion of image information hiding in the space domain and the small capacity in frequency domain, a scheme of triangular-ciphers was proposed based on two-dimensional chaotic maps with analysis on theory and technology of information hiding. Firstly, the image information algorithm in the secret image＇s pixel position was scrambled by two-dimensional Baker map to make the spectrum energy evenly distribu- ted. This promotes information hiding in preventing hidden information being detected by statistical method. Then the scrambled image was hidden by triangular algorithm. The experimental results show that this scheme realizes double encryption, increasing difficuhy of decipher, with larger key space and higher stego-image＇s fidelity. Images of any size can be enciphered more efficiently.

关 键 词：信息隐藏 混沌 BAKER映射 三角形算法 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]