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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 29 — Oct. 10, 2010
  • pp: 5632–5637

Image encryption by encoding with a nonuniform optical beam in gyrator transform domains

Zhengjun Liu, Lie Xu, Chuang Lin, and Shutian Liu  »View Author Affiliations


Applied Optics, Vol. 49, Issue 29, pp. 5632-5637 (2010)
http://dx.doi.org/10.1364/AO.49.005632


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Abstract

Based on an optical gyrator transform system, an image encryption algorithm is designed and studied. An original secret image is regarded as the output intensity of the second gyrator transform. A coherent nonuniform optical beam is converted into the input of the first gyrator transform. A Gerchberg–Saxton phase retrieval algorithm is employed for obtaining the compensation phases in the first gyrator transform pair. The compensation phases are regarded as the encrypted image and key in this algorithm. The parameters of the laser beam and gyrator transform can serve as the additional key of encryption method. The decryption process of this encryption algorithm can be achieved with an optical system. Numerical simulations are performed to test the validity and capability of the encryption algorithm.

© 2010 Optical Society of America

OCIS Codes
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(100.2000) Image processing : Digital image processing

ToC Category:
Image Processing

History
Original Manuscript: May 27, 2010
Manuscript Accepted: September 8, 2010
Published: October 7, 2010

Citation
Zhengjun Liu, Lie Xu, Chuang Lin, and Shutian Liu, "Image encryption by encoding with a nonuniform optical beam in gyrator transform domains," Appl. Opt. 49, 5632-5637 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-29-5632

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