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Please use this identifier to cite or link to this item: http://hdl.handle.net/10373/769

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Title: Triple joint transform correlator
Authors: Zhang, Hui
Cartwright, Colin M.
Ding, Meisong
Gillespie, G. A.
Affiliation: University of Abertay Dundee. School of Computing & Engineering Systems
Keywords: Joint transform correlator
Optical object recognition
Issue Date: 1999
Publisher: The International Society for Optical Engineering
Type: Conference Paper
Refereed: peer-reviewed
Rights: Published version (c)SPIE, available from doi:10.1117/12.341300
Citation: Hui Z., et al. 1999. Triple joint transform correlator. SPIE's 13th Annual International Symposium on Aerospace/Defense Sensing,Simulation and Controls,5-9 April, 1999, Orlando, Florida USA, SPIE Proceedings: Optical Pattern recognition X. 3715. pp.185-196. Available from http://dx.doi.org/doi:10.1117/12.341300
Abstract: The joint transform correlator (JTC) is a robust architecture for optical object recognition or verification and has been investigated intensively for a number of years. In order to improve its performance digital processing, such as binarization to an appropriate threshold, has been proposed at the recording stage of the joint power spectrum (JPS), this of course to some extent negates the benefits of an optical system. We propose to employ a third beam which is coherent to the beams forming the JPS and is the Fourier transform of an appropriate third input image and thus can be used to modify the JPS so as to implement a phase only filtering action for example. The triple joint transform correlator thus consists of three Fourier spectra incident simultaneously on a photorefractive crystal and can exhibit improved discrimination over the conventional JTC without an intermediate digital processing stage. Computer simulations and experimental results are presented.
URI: http://hdl.handle.net/10373/769
Appears in Collections:Computing & Engineering Systems Collection

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