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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 4 — Feb. 13, 2012
  • pp: 3853–3865

Optical color-image encryption and synthesis using coherent diffractive imaging in the Fresnel domain

Wen Chen, Xudong Chen, and Colin J. R. Sheppard  »View Author Affiliations

Optics Express, Vol. 20, Issue 4, pp. 3853-3865 (2012)

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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 OSA

OCIS Codes
(100.2000) Image processing : Digital image processing
(100.3190) Image processing : Inverse problems
(110.1650) Imaging systems : Coherence imaging
(060.4785) Fiber optics and optical communications : Optical security and encryption
(100.4998) Image processing : Pattern recognition, optical security and encryption

ToC Category:
Image Processing

Original Manuscript: October 25, 2011
Revised Manuscript: December 7, 2011
Manuscript Accepted: January 3, 2012
Published: February 1, 2012

Wen Chen, Xudong Chen, and Colin J. R. Sheppard, "Optical color-image encryption and synthesis using coherent diffractive imaging in the Fresnel domain," Opt. Express 20, 3853-3865 (2012)

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