基于改进的Arnold变换的数字图像置乱  

Digital Image Scrambling Based on Improved Arnold Transformation

作　　者：司银女[1] 康宝生[1] 

机构地区：[1]西北大学信息科学与技术学院,陕西西安710069

出　　处：《计算机技术与发展》2008年第2期74-76,79,共4页Computer Technology and Development

基　　金：陕西省自然科学基金(2005A14)

摘　　要：随着网络和现代通信技术的飞速发展,数字化多媒体信息的安全问题正日益成为人们关注的焦点,对信息的安全传输提出了更高的要求。信息隐藏成为信息技术领域的一大研究热点。改进了传统的Arnold变换。采用改进的Arnold变换对数字图像进行双向置乱,提高了置乱算法的效率,改善了置乱效果。通过在置乱算法中加入密钥,提高了算法的安全性。算法简单易行,可作为数字图像信息隐藏的预处理工具。With the rapid development of Intemet and the modem tdecommunication technology, digital information security has increasingly been cared, a higher request has been raised for information transmission safety. Information hiding has become a hot field in the society of information science and technology. The Arnold transformation is always being used in one direction. In this thesis, a modification has been given on Arnold transformation. While the modified Arnold transformation is used to scramble a digital image in two directions, the computing cost are reduced notably and the result of scrambling has a more improvement. By using secret key in scrambling, the security of the algorithm is increased. The approaches are easy to realize, and can be used as the preproessing for the digital image information hiding.

关 键 词：ARNOLD变换 数字图像置乱 数字图像隐藏 密钥 峰值信噪比 

分 类 号：TN911[电子电信—通信与信息系统]