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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 21 — Jul. 20, 2014
  • pp: 4700–4707

Optical encryption of unlimited-size images based on ptychographic scanning digital holography

Qiankun Gao, Yali Wang, Tuo Li, and Yishi Shi  »View Author Affiliations


Applied Optics, Vol. 53, Issue 21, pp. 4700-4707 (2014)
http://dx.doi.org/10.1364/AO.53.004700


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Abstract

The ptychographic scanning operation is introduced into digital holography to expand the field-of-view (FOV). An optical image encryption method based on this technique is further proposed and analyzed. The plaintext is moved sequentially in the way of ptychographic scanning and corresponding pairs of phase-shifted interferograms are recorded as ciphertexts. Then the holographic processing and the ptychographic iterative reconstruction are both employed to retrieve the plaintext. Numerical experiments demonstrate that the proposed system possesses high security level and wide FOV. The proposed method might also be used for other potential applications, such as three-dimensional information encryption and image hiding.

© 2014 Optical Society of America

OCIS Codes
(110.1650) Imaging systems : Coherence imaging
(090.1995) Holography : Digital holography
(060.4785) Fiber optics and optical communications : Optical security and encryption
(100.4998) Image processing : Pattern recognition, optical security and encryption

ToC Category:
Holography

History
Original Manuscript: March 11, 2014
Revised Manuscript: June 11, 2014
Manuscript Accepted: June 11, 2014
Published: July 17, 2014

Citation
Qiankun Gao, Yali Wang, Tuo Li, and Yishi Shi, "Optical encryption of unlimited-size images based on ptychographic scanning digital holography," Appl. Opt. 53, 4700-4707 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-21-4700

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