Double image encryption using phase-shifting interferometry and random mixed encoding method in fractional Fourier transform domain

Qu Wang; Qing Guo; Liang LeiJinyun Zhou

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Double image encryption using phase-shifting interferometry and random mixed encoding method in fractional Fourier transform domain

机译：Double image encryption using phase-shifting interferometry and random mixed encoding method in fractional Fourier transform domain

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摘要

Based on the two-step phase-shifting interference (PSI) technique in fractional Fourier transform (FRT) domain and random mixed encoding, we present a new scheme for double image encryption. In the proposed scheme, information of each primitive image is recorded in two intensity interference patterns of FRT spectra by PSI technique, from which an encrypted image for each primitive image can be digitally derived. Random mixed encoding is then employed to divide and recombine both encrypted images into a single synthetic encrypted image. During the mixed encoding process, repositioning operations based on shift-variance of FRT are performed on the encrypted images to realize the spatial separation of decoded results in the output plane. By inverse FRT with correct fractional order, any of the primitive images can be easily retrieved directly from the synthetic encoded image with the corresponding phase encoding key. Crosstalk effect due to the overlapping of decoded images is alleviated for their spatial separation. Computer simulation and experimental results are presented to verify the validity and efficiency of our scheme.

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来源
《Optical Engineering》 |2013年第8期|084101-1-084101-8|共8页
作者
Qu Wang; Qing Guo; Liang LeiJinyun Zhou;
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作者单位

Guangdong University of Technology, School of Physics and Optoelectronic Engineering, Guangzhou, 510006, China;

Center for Earth Observation and Digital Earth, Chinese Academy of Sciences, Beijing 100094, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类计量学;
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Double image encryption using phase-shifting interferometry and random mixed encoding method in fractional Fourier transform domain

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