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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 34, Iss. 24 — Dec. 15, 2009
  • pp: 3917–3919

Multiple-image encryption and multiplexing using a modified Gerchberg–Saxton algorithm and phase modulation in Fresnel-transform domain

Hone-Ene Hwang, Hsuan T. Chang, and Wen-Nung Lie  »View Author Affiliations

Optics Letters, Vol. 34, Issue 24, pp. 3917-3919 (2009)

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What we believe to be a new technique, based on a modified Gerchberg–Saxton algorithm (MGSA) and a phase modulation scheme in the Fresnel-transform domain, is proposed to reduce cross talks existing in multiple-image encryption and multiplexing. First, each plain image is encoded and multiplexed into a phase function by using the MGSA and a different wavelength/position parameter. Then all the created phase functions are phase modulated to result in different shift amounts of the reconstruction images before being combined together into a single phase-only function. Simulation results show that the cross talks between multiplexed images have been significantly reduced, compared with prior methods [ Opt. Lett. 30, 1306 (2005) ; J. Opt. A 8, 391 (2006) ], thus presenting high promise in increasing the multiplexing capacity and encrypting grayscale and color images.

© 2009 Optical Society of America

OCIS Codes
(100.3010) Image processing : Image reconstruction techniques
(100.5070) Image processing : Phase retrieval
(060.4785) Fiber optics and optical communications : Optical security and encryption

ToC Category:
Image Processing

Original Manuscript: September 21, 2009
Manuscript Accepted: November 12, 2009
Published: December 15, 2009

Hone-Ene Hwang, Hsuan T. Chang, and Wen-Nung Lie, "Multiple-image encryption and multiplexing using a modified Gerchberg-Saxton algorithm and phase modulation in Fresnel-transform domain," Opt. Lett. 34, 3917-3919 (2009)

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