Abstract
Optical novelty filter based on the two-wave mixing in a photorefractive BaTiO3 crystal is applied to motion detection for the purpose of its application to the robot vision. A simple method is proposed to realize the reflex vision system that a human being possesses. Our method uses a photo detector array to detect the output from the optical novelty filter and the detector element that obtains the highest signal is selected. By simulations using a simple animations, it is showed that the larger or the faster object can be detected in higher probability. Tracking a moving object is demonstrated with a 2×2 photo-transistor array and the selective circuit including the exclusive gate circuit.
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