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Sensors 2014, 14(5), 8877-8894; doi:10.3390/s140508877

A Multispectral Photon-Counting Double Random Phase Encoding Scheme for Image Authentication

1
Department of Computer Engineering, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju 501-759, Korea
2
School of Information and Communication Engineering, Sungkyunkwan University, Suwon, Kyongkido 440-746, Korea
*
Author to whom correspondence should be addressed.
Received: 19 February 2014 / Revised: 13 May 2014 / Accepted: 15 May 2014 / Published: 20 May 2014
(This article belongs to the Section Physical Sensors)
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Abstract

In this paper, we propose a new method for color image-based authentication that combines multispectral photon-counting imaging (MPCI) and double random phase encoding (DRPE) schemes. The sparsely distributed information from MPCI and the stationary white noise signal from DRPE make intruder attacks difficult. In this authentication method, the original multispectral RGB color image is down-sampled into a Bayer image. The three types of color samples (red, green and blue color) in the Bayer image are encrypted with DRPE and the amplitude part of the resulting image is photon counted. The corresponding phase information that has nonzero amplitude after photon counting is then kept for decryption. Experimental results show that the retrieved images from the proposed method do not visually resemble their original counterparts. Nevertheless, the original color image can be efficiently verified with statistical nonlinear correlations. Our experimental results also show that different interpolation algorithms applied to Bayer images result in different verification effects for multispectral RGB color images.
Keywords: optical security and encryption; pattern recognition; multispectral photon counting imaging; double random phase encryption; nonlinear correlators; color images optical security and encryption; pattern recognition; multispectral photon counting imaging; double random phase encryption; nonlinear correlators; color images
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Yi, F.; Moon, I.; Lee, Y.H. A Multispectral Photon-Counting Double Random Phase Encoding Scheme for Image Authentication. Sensors 2014, 14, 8877-8894.

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