REAL-TIME PATTERN-RECOGNITION BY VANDERLUGT CORRELATOR USING AMPLITUDE AND PHASE MODULATION PROPERTIES OF THE EPSON LIQUID-CRYSTAL TV

We have built an optical VanderLugt-type correlator that uses two Epso n liquid crystal televisions (LCTVs) separately generating the amplitu de and phase modulation properties. The input scene is displayed in am plitude-mostly regime on the first LCTV. Thereafter a phase-only filte r with a different level of phase quantization is addressed in phase-m ostly regime on the second LCTV. To characterize this device, the phas e and amplitude modulations were experimentally measured and investiga ted in pattern recognition application where the grey-level input scen es and multilevel kinoforms are displayed on the LCTVs.