Pattern recognition system

摘要

An improved pattern recognition system is disclosed which converts rows and columns of digitized video signal elements indicative of light intensity falling on a camera into integrated signatures, one for each of two orthogonal directions. Signatures corresponding to effectively rotated images may also be provided. Portions of the signatures having the most useful information contained therein are selected by comparison with subsets of the total signatures in a teach mode. In a run mode, the thus selected sub signatures are compared with snapshot signatures of a target object, such as integrated circuit dice, for precise location of corresponding portions of the target object.