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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 20 — Sep. 24, 2012
  • pp: 22847–22859

Two-out-of-two color matching based visual cryptography schemes

Jacques Machizaud and Thierry Fournel  »View Author Affiliations

Optics Express, Vol. 20, Issue 20, pp. 22847-22859 (2012)

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Visual cryptography which consists in sharing a secret message between transparencies has been extended to color prints. In this paper, we propose a new visual cryptography scheme based on color matching. The stacked printed media reveal a uniformly colored message decoded by the human visual system. In contrast with the previous color visual cryptography schemes, the proposed one enables to share images without pixel expansion and to detect a forgery as the color of the message is kept secret. In order to correctly print the colors on the media and to increase the security of the scheme, we use spectral models developed for color reproduction describing printed colors from an optical point of view.

© 2012 OSA

OCIS Codes
(100.2810) Image processing : Halftone image reproduction
(120.7000) Instrumentation, measurement, and metrology : Transmission
(230.4170) Optical devices : Multilayers
(330.1690) Vision, color, and visual optics : Color
(100.4998) Image processing : Pattern recognition, optical security and encryption

ToC Category:
Image Processing

Original Manuscript: March 23, 2012
Revised Manuscript: July 5, 2012
Manuscript Accepted: July 10, 2012
Published: September 20, 2012

Jacques Machizaud and Thierry Fournel, "Two-out-of-two color matching based visual cryptography schemes," Opt. Express 20, 22847-22859 (2012)

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