Image security based on iterative random phase encoding in expanded fractional Fourier transform domains
Image security based on iterative random phase encoding in expanded fractional Fourier transform domains
复制标题
基于扩展分数傅立叶变换域迭代随机相位编码的图像安全
DOI:
10.1016/j.optlaseng.2017.12.007
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发表时间:
2018-06
影响因子:
4.6
通讯作者:
Shutian Liu
中科院分区:
文献类型:
--
作者:
Zhengjun Liu;Hang Chen;Walter Blondel;Zhenmin Shen;Shutian Liu
A novel image encryption method is proposed by using the expanded fractional Fourier transform, which is implemented with a pair of lenses. Here the centers of two lenses are separated at the cross section of axis in optical system. The encryption system is addressed with Fresnel diffraction and phase modulation for the calculation of information transmission. The iterative process with the transform unit is utilized for hiding secret image. The structure parameters of a battery of lenses can be used for additional keys. The performance of encryption method is analyzed theoretically and digitally. The results show that the security of this algorithm is enhanced markedly by the added keys.
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