Image encryption based on anamorphic fractional Fourier transform and three-step phase-shifting interferometry
Image encryption based on anamorphic fractional Fourier transform and three-step phase-shifting interferometry
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DOI：
10.1016/j.optcom.2006.07.024
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发表时间：
2006-12
影响因子：
2.4
通讯作者：
Xiaogang Wang;Daomu Zhao
中科院分区：
文献类型：
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作者：
Xiaogang Wang;Daomu Zhao
提出了一种基于变形分数傅里叶变换（FRT）和相移干涉（PSI）的光学图像加密新方法。对输入的待加密二维图像分别在两个正交方向上进行不同阶数的变形分数傅里叶变换。在FRT域中采用双随机相位编码技术，采用三步PSI记录加密数据的数字全息图。变形FRT的阶数、分数傅里叶平面中的随机相位掩模以及用于记录的任意相移形成用于解密输入图像的密钥。计算机仿真验证了该方法的正确性和可行性。
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.