基于相邻点运算与混沌映射的图像置乱方法  

An Image Scrambling Algorithm Based on Bit Operation and Chaotic Maps

作　　者：谭永杰[1] 王倩[1] 

机构地区：[1]周口师范学院计算机科学与技术学院,周口466001

出　　处：《计算机与数字工程》2013年第8期1340-1342,1373,共4页Computer & Digital Engineering

摘　　要：为了更安全有效地传输数字图像,提出一种将相邻像素点运算与混沌映射相结合的图像置乱方法。该方法通过将图像相邻点逐个进行异或操作,得到初步置乱效果图,然后再对其运用混沌映射理论进行置乱,从而得到置乱后的加密图像。通过HVS(Human VisualSystem人类视觉系统)及仿真实验结果证明,该方法置乱效果明显优于Arnold法、Hilbert法等现有置乱方法,且实现简单。Aiming at the safe problem of image transmission, this paper presents an image scrambling algorithm based on bit-exclusive-or and chaotic maps. The algorithm does a bit-exclusive-or operation on each pixel with its prior one first and gets the preliminary scrambed image. Then uses the chaotic maps theory mess the preliminary serambed image again, thereby the effect of image scrambling is improved again. The experimental results show that the algorithm not only is superior to several existing methods, such as Arnold, Hilbert, MSB or gray code, but also can be easily implemented.

关 键 词：图像置乱 GRAY码 混沌映射 置乱程度 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]