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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 36 — Dec. 20, 2013
  • pp: 8854–8863

Multiple-image encryption using polarized light encoding and the optical interference principle in the Fresnel-transform domain

Qu Wang, Qing Guo, and Jinyun Zhou  »View Author Affiliations

Applied Optics, Vol. 52, Issue 36, pp. 8854-8863 (2013)

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We propose a multiple-image encryption scheme, based on polarized light encoding and the interference principle of phase-only masks (POMs), in the Fresnel-transform (FrT) domain. In this scheme, each secret image is converted into an intensity image by polarized light encoding, where a random key image and a pixilated polarizer with random angles are employed as keys. The intensity encrypted images produced by different secret images are convolved together and then inverse Fresnel-transformed. Phase and amplitude truncations are used to generate the asymmetric decryption keys. The phase-truncated inverse FrT spectrum is sent into an interference-based encryption (IBE) system to analytically obtain two POMs. To reduce the transmission and storage load on the keys, the chaotic mapping method is employed to generate random distributions of keys for encryption and decryption. One can recover all secret images successfully only if the corresponding decryption keys, the mechanism of FrTs, and correct chaotic conditions are known. The inherent silhouette problem can be thoroughly resolved by polarized light encoding in this proposal, without using any time-consuming iterative methods. The entire encryption and decryption process can be realized digitally, or in combination with optical means. Numerical simulation results are presented to verify the effectiveness and performance of the proposed scheme.

© 2013 Optical Society of America

OCIS Codes
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(100.0100) Image processing : Image processing

ToC Category:
Fourier Optics and Signal Processing

Original Manuscript: October 7, 2013
Manuscript Accepted: November 19, 2013
Published: December 20, 2013

Qu Wang, Qing Guo, and Jinyun Zhou, "Multiple-image encryption using polarized light encoding and the optical interference principle in the Fresnel-transform domain," Appl. Opt. 52, 8854-8863 (2013)

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