摘要
以图象信息安全问题为背景,分析了Arnold变换、排列变换、Fibonacci变换存在的不足,提出了一种新的仿射变换,新变换避免了取模运算且其逆变换有简洁的解析表达式,分析及实验表明新变换在进行图象置乱时效果很好,且计算时间复杂度低。
With the security problem of image information as the background,the shortage of several transformations(i.e.Arnold transformation,permutation transformation and Fibonacci transformation)is analyzed.A new transformation,which avoids module operation,affine transformation is presented,its inverse transformation possessing simple analyses form.Analytic and experimental results shows that the new transformation scrambling images effectively and computing com-plexity lowly.
出处
《计算机工程与应用》
CSCD
北大核心
2002年第10期74-75,78,共3页
Computer Engineering and Applications
基金
通信部资助项目
重庆市科委科技计划资助项目(编号:6986)
