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30 September 2016 Double-image encryption using chaotic maps and nonlinear non-DC joint fractional Fourier transform correlator
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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.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2016/$25.00 © 2016 SPIE
Hongjie Zhao, Zhi Zhong, Weiwei Fang, Hong Xie, Yabin Zhang, and Mingguang Shan "Double-image encryption using chaotic maps and nonlinear non-DC joint fractional Fourier transform correlator," Optical Engineering 55(9), 093109 (30 September 2016). https://doi.org/10.1117/1.OE.55.9.093109
Published: 30 September 2016
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