基于混沌的图像小波域加密算法  

Chaos-based algorithm for image encryption in wavelet domain

作　　者：何希平[1] 朱庆生[2] 

机构地区：[1]重庆工商大学计算机科学与信息工程学院,重庆400067 [2]重庆大学计算机学院,重庆400044

出　　处：《计算机应用》2007年第8期1895-1897,1900,共4页journal of Computer Applications

基　　金：重庆市科委自然科学基金计划资助项目(CSTC2006BB2249)

摘　　要：研究了适应用于JPEG2000标准的图像加密技术。首先给出了一个基于Chebychev多项式的混沌映射,分析了它的统计特性;为实现基于质量可控的图像加密,构建了加密质量控制模型,并在此基础上进一步构造了图像小波域加密算法,对算法进行了有效性分析。实验结果验证了该算法的可靠性、安全性和高效性,而且对JPSEC是实用的。The image encryption technology adapted to JPEG2000 standard was studied. A chaotic map based on Chebychev polynomial was proposed at first, and its statistic characteristics were analyzed. To accomplish a controllable visual effect of encrypted image, a quality control model was presented, and on the basis of which a chaotic-map-based image encryption method was constructed in wavelet domain. The security and efficiency of the algorithm were also analyzed, Experimental results prove that the algorithm is reliable, secure and efficient, and is practical to JPSEC.

关 键 词：混沌映射 小波变换 图像 加密 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]