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Optical Engineering

Double-image encryption using chaotic maps and nonlinear non-DC joint fractional Fourier transform correlator
Author(s): Hongjie Zhao; Zhi Zhong; Weiwei Fang; Hong Xie; Yabin Zhang; Mingguang Shan
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Paper Abstract

A double-image encryption method is reported using chaotic maps, nonlinear non-DC joint transform correlator (JTC), and fractional Fourier transform (FrFT). The double images are converted into the amplitude and phase of a synthesized function through the application of chaotic pixel scrambling. The synthesized function bonded with a chaotic random phase mask (CRPM) and another different CRPM serve as the input signal of the JTC architecture in the fractional Fourier domain to obtain a real-valued encrypted image. The nonlinear and non-DC operation is also done to improve the security and decrypted image quality. The parameters in joint FrFT correlator and chaotic map serve as the encrypted keys. Numerical simulations have been done to demonstrate the feasibility and validity of this algorithm.

Paper Details

Date Published: 30 September 2016
PDF: 7 pages
Opt. Eng. 55(9) 093109 doi: 10.1117/1.OE.55.9.093109
Published in: Optical Engineering Volume 55, Issue 9
Show Author Affiliations
Hongjie Zhao, Harbin Engineering Univ. (China)
Zhi Zhong, Harbin Engineering Univ. (China)
Weiwei Fang, Harbin Normal Univ. (China)
Hong Xie, Harbin Engineering Univ. (China)
Yabin Zhang, Harbin Engineering Univ. (China)
Mingguang Shan, Harbin Engineering Univ. (China)


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