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Optical Security System Based on the Phase Characteristic of Joint Transform Correlator  

박세준 (구미1대학 전자정보과)
서동환 (경북대학교 전자전기컴퓨터학부)
김수종 (경북대학교 전자전기컴퓨터학부)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.40, no.6, 2003 , pp. 400-407 More about this Journal
Abstract
In this paper an optical encryption system, which can decrypt the original image by using the autocorrelation terms of a JTC, is proposed. Unlike the classical JTC, the joint input plane of the proposed system is composed in a frequency domain not a spatial domain, thus it needs only one Fourier transformation. To use like this, the phase component appeared in the output plane of JTC should be considered. We presents the effect of phase and provides the solution. An original image is encrypted to a complex-valued random image. The original image is reconstructed using the autocorrelation terms which is the main drawback of JTC, therefore the proposed system is more suitable for JTC and real time processing. By computer simulation and optical experiment, the analysis for the phase effect and the performance of the proposed system are confirmed.
Keywords
encryption; decryption; phase modulation; joint transform correlator;
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Times Cited By KSCI : 1  (Citation Analysis)
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