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Proceedings Paper

Hardware implementation details of a hybrid digital/optical correlator system
Author(s): Rupert C. D. Young; Frederic Claret-Tournier; Gongde Li; Philip Birch; David M. Budgett; Triantafillos Koukoulas; Christopher R. Chatwin
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Paper Abstract

A consideration of the system advantages of a hybrid digital/optical correlator configuration together with some details of its construction were reported at the OPR X Conference. In this arrangement the input scene is digitally Fourier transformed at video-rate with a digital signal processor, the spectral data mixed with digitally stored templates and the result loaded onto a high frame-rate Spatial Light Modulator (SLM). An optical Fourier transform of this display then implements a correlation between the input scene and the reference template. Since the optical Fourier transform is practically instantaneous and the digital mixing and display on the SLM can accomplished at least two orders of magnitude faster than the digital Fourier transform, many reference templates may be searched during an input frame interval. Thus unconstrained pattern recognition problems may be tackled with this device.

Paper Details

Date Published: 31 March 2000
PDF: 15 pages
Proc. SPIE 4043, Optical Pattern Recognition XI, (31 March 2000); doi: 10.1117/12.381611
Show Author Affiliations
Rupert C. D. Young, Univ. of Sussex at Brighton (United Kingdom)
Frederic Claret-Tournier, Univ. of Sussex at Brighton (United Kingdom)
Gongde Li, Univ. of Sussex at Brighton (United Kingdom)
Philip Birch, Univ. of Sussex at Brighton (United Kingdom)
David M. Budgett, Univ. of Sussex at Brighton (United Kingdom)
Triantafillos Koukoulas, Univ. of Sussex at Brighton (United Kingdom)
Christopher R. Chatwin, Univ. of Sussex at Brighton (United Kingdom)


Published in SPIE Proceedings Vol. 4043:
Optical Pattern Recognition XI
David P. Casasent; Tien-Hsin Chao, Editor(s)

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