摘要
针对二维图像加密系统的安全性问题,本文提出一种融合分数傅里叶变换和图像置换技术的光学图像加密方案。首先,使用jigsaw变换算法将原始图像分解成若干子图,并随机平移子图;然后,利用Arnold变换对图像像素进行置乱;最后,采用分数傅里叶变换加密置乱图像,并迭代重复这些过程。将jigsaw排列指标、Arnold频率和分数傅里叶阶等参数组成一个密钥空间,通过仿真实验在光学实现方面评估算法性能。实验结果表明,本文提出的方案具有很好的灵活性和鲁棒性。
For the security issue of two-dimensional image encryption,an optical image fusion fractional Fourier transform and image replacement techniques of encryption scheme is proposed.Firstly,jigsaw transform algorithm is used to decompose the original image into several sub graphs,shifting subgraph randomly.Then,Arnold transform（ART） is used to scramble pixel of image.Finally,scrambling image by using fractional Fourier transform,and repeat the process of iteration.The jigsaw array index,Arnold frequency and fractional Fourier order parameters constitute a key space.Through the simulation in the optical implementation evaluation of the performance of algorithm,experimental results show that proposed scheme has better flexibility and robustness.
出处
《激光杂志》
CAS
CSCD
北大核心
2014年第11期11-15,共5页
Laser Journal
基金
国家自然科学基金资助项目(61202163)
山西省自然科学基金项目(2013011017-2)
山西省科技攻关项目(20130313015-1)
