基于Arnold变换的图像置乱算法及实现

Image Scrambling Based on Arnold Transforming and Implementation

随着互联网的普及和网络带宽的提高,人们越来越多的在互联网上传输图像、视频等多媒体信息,开展如远程教学、网络办公等网络业务。许多重要的图像信息也会在互联网上传播,如:病人病例、设计图纸、军事资料,这些重要的图像信息在互联网上传输时必须进行加密,图像置乱技术可以做为图像信息的一种加密算法。本文首先介绍了常用的几种图像置乱算法,然后讨论了基于Arnold变换的图形置乱算法及其周期性,最后用MATLAB7.0对这一算法进行了实现。

With the popularization of Internet and increase of bandwidth, the transmission of multimedia information such as image and video frequency ,become increasingly convenient and fast. Long-distance medical treatment and office automation can be realized by Internet, too. Besides, many important image information can be spread through Intemet. For example, patients＇ cases, drawing design, military information. But these information must be encrypted. Image Scrambling can be regarded as one of the encryption techniques. In this pager, we introduced Arnold transforming, then discussed image scrambling based on Arnold transforming and it＇ s period. At last we implemented the arithmetic by matlab 7.0.