基于随机区域移位和随机像素映射的图像加密  

Image Encryption Based on Region Shifting Encoding and Pixel Mapping

作　　者：黄飞[1] 冯少彤[1] 王亮[1] 聂守平[1] 

机构地区：[1]南京师范大学江苏省光电技术重点实验,江苏南京210097

出　　处：《南京师范大学学报（工程技术版）》2006年第3期66-69,共4页Journal of Nanjing Normal University(Engineering and Technology Edition)

基　　金：江苏省教育厅自然科学基金资助项目(05KJB140065)

摘　　要：提出基于随机区域移位和随机像素映射的图像加密算法.该算法首先对待加密图像进行分割,然后将分割出来的图像单元顺序随机打乱,扰乱了图像的原始信息;然后再对每个图像单元进行像素映射扰乱,切断了各个单元像素值之间的联系.该算法结合了区域移位算法和像素映射算法的优点.计算机模拟表明该算法自由度大、保密性强,对二值图像和灰度图像加密都取得了很好的效果.Based on region shifting encoding and pixel mapping, the paper proposes image encryption algorithm. The image to be encrypted is divided into several units, and the positions of these units are changed randomly. Then each unit is disturbed by the pixel mapping, cutting the relations between the values of pixels in every unit. The algorithm is based on the virtues of the region shifting and pixel mapping. The results of computer simulation show that this method is flexible in the freedom and strong in secrecy, especially for the binary images and grayscale images.

关 键 词：图像加密 区域移位 像素映射 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]