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Please use this identifier to cite or link to this item: http://hdl.handle.net/10373/743

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Title: Implementation of a photorefractive binary joint transform correlator
Authors: Cook, N. J.
Carnicer, A.
Vallmitjana, S.
Juvells, I.
Cartwright, Colin M.
Gillespie, W. A.
Affiliation: University of Abertay Dundee. School of Computing & Engineering Systems
Keywords: Optics
Issue Date: 1998
Publisher: Optical Society of America
Type: Journal Article
Refereed: peer-reviewed
Rights: Published version (c)Optical Society of America, available from doi:10.1364/JOSAB.15.001977
Citation: Cook, N.J. et al. 1998. Implementation of a photorefractive binary joint transform correlator. Journal of the Optical Society of America B: Optical Physics (JOSA B). 15(7): pp.1977-1984. Available from http://dx.doi.org/doi:doi:10.1364/JOSAB.15.001977
Abstract: The use of photorefractive materials such as Bi 12 SiO 20 as dynamic holographic media is becoming an interesting alternative to that of the current liquid-crystal-based modulators in real-time optical image processing. We present an experimental realization of optical correlation for pattern recognition by means of a photorefractive joint transform correlator. The correlator operates with a liquid-crystal television as the input and a photorefractive crystal at the recording plane. We consider two possible ways of registering the Fourier plane information: conventional detection of the joint power spectrum, and utilization of only phase information at the Fourier plane by suitable preprocessing of the scene and the reference at the object plane. We compare the latter case with the performance of a binary joint transform correlator. Analysis, simulations, and experimental results are presented.
URI: http://hdl.handle.net/10373/743
Appears in Collections:Computing & Engineering Systems Collection

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