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Image encryption based on anamorphic fractional Fourier transform and three-step phase-shifting interferometry

被引：42
作者：
Wang, Xiaogang
Zhao, Daomu [1 ]
机构：
[1] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China
[2] Zhejiang Forestry Univ, Sch Sci, Dept Informat Phys, Linan 311300, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2006年 / 268卷 / 02期
基金：
中国国家自然科学基金;
关键词：
image encryption; decryption; fractional Fourier transform; digital holography;
D O I：
10.1016/j.optcom.2006.07.024
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A new optical image encryption method based on anamorphic fractional Fourier transform (FRT) and phase-shifting interferometry (PSI) is proposed in this paper. The input two-dimensional image to be encrypted is anamorphic fractional Fourier transformed with different orders in the two orthogonal directions, respectively. Three-step PSI is applied to record the digital hologram of the data encrypted by use of double-random phase encoding technique in the FRT domain. The orders of anamorphic FRT, random phase mask in the fractional Fourier plane and the arbitrary phase shifts used for recording form the keys for decryption of the input image. The correctness and feasibility of this method are verified by computer simulations. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：240 / 244
页数：5
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