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Optical Engineering

On-board optical joint transform correlator for real-time road sign recognition
Author(s): Laurent Guibert; Gilles Keryer; Alain Servel; Mondher Attia; Harry S. MacKenzie; Pierre Pellat-Finet; Jean-Louis M. de Bougrenet de la Tocnaye
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Paper Abstract

We design, implement, and test an on-board optical joint transform correlator, using a nonlinear optically addressed ferroelectric liquid-crystal spatial light modulator in the Fourier plane. This compact correlator performs real-time and on-board recognition tasks, such as road sign recognition. The influence of the nonlinearity in the Fourier plane is investigated, and scale-invariant filters are tested and implemented. Preliminary results from real-time dynamic scenario experiments are presented. Electronic and optical pre- and postprocessing as well as the extension to silicon backplane devices are discussed.

Paper Details

Date Published: 1 January 1995
PDF: 9 pages
Opt. Eng. 34(1) doi: 10.1117/12.183999
Published in: Optical Engineering Volume 34, Issue 1
Show Author Affiliations
Laurent Guibert, PSA Peugeot Citroen (France)
Gilles Keryer, Ecole Navale (France)
Alain Servel, PSA Peugeot Citroen (France)
Mondher Attia, PSA Peugeot Citroen (France)
Harry S. MacKenzie, Cambridge Univ. (United Kingdom)
Pierre Pellat-Finet, ENSTB (France)
Jean-Louis M. de Bougrenet de la Tocnaye, ENST de Bretagne (France)


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