We design, implement, and test an optical joint transform correlator,
using a nonlinear optically addressed ferroelectric liquid-crystal spa
tial light modulator in the Fourier plane. This compact correlator per
forms real-time and on-board recognition tasks. Results of in-car expe
riments for road sign recognition in real environments are presented.
(C) 1997 Society of Photo-Optical Instrumentation Engineers.