Hardware implementation details of a hybrid digital/optical correlator system

Rupert C. D. Young; Frederic Claret-Tournier; Gongde Li; Philip Birch; David M. Budgett; Triantafillos Koukoulas; Christopher R. Chatwin

doi:10.1117/12.381611

31 March 2000 Hardware implementation details of a hybrid digital/optical correlator system

Rupert C. D. Young, Frederic Claret-Tournier, Gongde Li, Philip Birch, David M. Budgett, Triantafillos Koukoulas, Christopher R. Chatwin

Author Affiliations +

Proceedings Volume 4043, Optical Pattern Recognition XI; (2000) https://doi.org/10.1117/12.381611
Event: AeroSense 2000, 2000, Orlando, FL, United States

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.

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Rupert C. D. Young, Frederic Claret-Tournier, Gongde Li, Philip Birch, David M. Budgett, Triantafillos Koukoulas, and Christopher R. Chatwin "Hardware implementation details of a hybrid digital/optical correlator system", Proc. SPIE 4043, Optical Pattern Recognition XI, (31 March 2000); https://doi.org/10.1117/12.381611

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