SPACE-VARIANT OPTICAL CORRELATION BY THE USE OF RANDOM BINARY PHASE MODULATION

A simple method to achieve space-variant pattern recognition is propos ed with a typical VanderLugt arrangement, in which the input pattern i s modulated by a random binary phase function. The output cot relation location can be programmed into the filter function. With the introdu ction of random binary phase modulation, the impulse response of eithe r phase-only or binary phase-only filter function is not edge enhanced , resulting in higher Horner efficiency. Computer simulations are cond ucted to verify the proposed method.