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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 34 — Dec. 1, 2011
  • pp: H315–H326

Embedding of computer-generated hologram in a dithered image

Ken-ichi Tanaka  »View Author Affiliations


Applied Optics, Vol. 50, Issue 34, pp. H315-H326 (2011)
http://dx.doi.org/10.1364/AO.50.00H315


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Abstract

We have developed an encryption method using a computer-generated hologram (CGH) embedded in a dithered image. First, confidential information is converted into a CGH. Next, the CGH data undergo two separate dithering processes in parallel: one corresponding to CGH white pixels and one corresponding to CGH black pixels. The results from both processes are used to form a dither matrix for creating the final dithered and encoded image. In this way, confidential information can be embedded into the image. The confidential information can be extracted using a technique similar to CGH optical reconstruction.

© 2011 Optical Society of America

OCIS Codes
(090.0090) Holography : Holography
(090.1760) Holography : Computer holography
(100.0100) Image processing : Image processing
(100.4995) Image processing : Pattern recognition, metrics

ToC Category:
Computer-Generated Holography

History
Original Manuscript: June 6, 2011
Revised Manuscript: August 28, 2011
Manuscript Accepted: October 28, 2011
Published: December 6, 2011

Virtual Issues
Digital Holography and 3D Imaging 2011 (2011) Applied Optics

Citation
Ken-ichi Tanaka, "Embedding of computer-generated hologram in a dithered image," Appl. Opt. 50, H315-H326 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-34-H315


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References

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