Abstract
A new technique has been developed to measure the shape, size, number density and position of objects simultaneously and instantaneously, by a single exposure hologram. This new technique was investigated theoretically and experimentally to search the possibility and conditions for recognizing shapes independent of the size and the inclination of objects. The permitted limits of size and inclination of objects recognized as the same shape and the same size as the master objects are clarified experimentally. The shapes and those positions of objects were simultaneously and instantaneously identified by a new Multiplexed Matched Spatial Filter.
