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Title: Optical color-image encryption and synthesis using coherent diffractive imaging in the Fresnel domain
Authors: Chen, W. 
Chen, X. 
Sheppard, C.J.R. 
Issue Date: 13-Feb-2012
Source: Chen, W., Chen, X., Sheppard, C.J.R. (2012-02-13). Optical color-image encryption and synthesis using coherent diffractive imaging in the Fresnel domain. Optics Express 20 (4) : 3853-3865. ScholarBank@NUS Repository.
Abstract: We propose a new method using coherent diffractive imaging for optical color-image encryption and synthesis in the Fresnel domain. An optical multiple-random-phase-mask encryption system is applied, and a strategy based on lateral translations of a phase-only mask is employed during image encryption. For the decryption, an iterative phase retrieval algorithm is applied to extract high-quality decrypted color images from diffraction intensity maps (i.e., ciphertexts). In addition, optical color-image synthesis is also investigated based on coherent diffractive imaging. Numerical results are presented to demonstrate feasibility and effectiveness of the proposed method. Compared with conventional interference methods, coherent diffractive imaging approach may open up a new research perspective or can provide an effective alternative for optical color-image encryption and synthesis. © 2012 Optical Society of America.
Source Title: Optics Express
ISSN: 10944087
DOI: 10.1364/OE.20.003853
Appears in Collections:Staff Publications

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