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Optical double-image cryptography based on diffractive imaging with a laterally-translated phase grating |
Applied Optics, Vol. 50, Issue 29, pp. 5750-5757 (2011)
http://dx.doi.org/10.1364/AO.50.005750
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Abstract
In this paper, we propose a method using structured-illumination-based diffractive imaging with a laterally-translated phase grating for optical double-image cryptography. An optical cryptosystem is designed, and multiple random phase-only masks are placed in the optical path. When a phase grating is laterally translated just before the plaintexts, several diffraction intensity patterns (i.e., ciphertexts) can be correspondingly obtained. During image decryption, an iterative retrieval algorithm is developed to extract plaintexts from the ciphertexts. In addition, security and advantages of the proposed method are analyzed. Feasibility and effectiveness of the proposed method are demonstrated by numerical simulation results.
© 2011 Optical Society of America
OCIS Codes
(050.1940) Diffraction and gratings : Diffraction
(100.2000) Image processing : Digital image processing
(100.3190) Image processing : Inverse problems
(100.5070) Image processing : Phase retrieval
(100.4998) Image processing : Pattern recognition, optical security and encryption
ToC Category:
Image Processing
History
Original Manuscript: May 19, 2011
Revised Manuscript: July 9, 2011
Manuscript Accepted: July 9, 2011
Published: October 7, 2011
Citation
Wen Chen, Xudong Chen, and Colin J. R. Sheppard, "Optical double-image cryptography based on diffractive imaging with a laterally-translated phase grating," Appl. Opt. 50, 5750-5757 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-29-5750
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