1 January 1995 On-board optical joint transform correlator for real-time road sign recognition
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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.
Laurent Guibert, Laurent Guibert, Gilles Keryer, Gilles Keryer, Alain Servel, Alain Servel, Mondher Attia, Mondher Attia, Harry S. MacKenzie, Harry S. MacKenzie, Pierre Pellat-Finet, Pierre Pellat-Finet, Jean-Louis M. de Bougrenet de la Tocnaye, Jean-Louis M. de Bougrenet de la Tocnaye, } "On-board optical joint transform correlator for real-time road sign recognition," Optical Engineering 34(1), (1 January 1995). https://doi.org/10.1117/12.183999 . Submission:
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