一种改进的Arnold变换  

A Modification of Arnold

作　　者：贾松浩[1] 杨彩[1] 张海玉[1] 刘晓霞[2] 

机构地区：[1]南阳师范学院计算机与信息技术学院,河南南阳473061 [2]西北大学信息科学与技术学院,西安710127

出　　处：《河南大学学报（自然科学版）》2009年第2期199-202,共4页Journal of Henan University:Natural Science

基　　金：陕西省自然科学基础研究计划项目(2006F50);南阳师范学院青年教师基金项目

摘　　要：基于置乱方法,针对载体图像为静态图像的信息隐藏技术进行研究,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.该算法简单易行,可作为数字图像信息隐藏和伪装的预处理工具.Based on scrambling, information hiding techniques are discussed in this paper, in which the static images are applied as carriers. This paper gives a modification of Arnold transformation. While the modified Arnold transformation is used to scramble a digital image in two directions, the computing cost is reduced notably and the result of scrambling has improved. By using secret key in scrambling, the security of the algorithm is increased. The approaches are easy to realize, and can be used as pre-processor for digital image hiding and covering.

关 键 词：数字图像置乱 ARNOLD变换 密钥 数字图像隐藏 

分 类 号：TP311.1[自动化与计算机技术—计算机软件与理论]