Pattern recognition system

摘要

A pattern recognition system comprises a partial pattern cutting out system which has a plurality of cutting out windows previously provided in correspondence with a plurality of regions in a specific pattern which respectively correspond to a characteristic part of the specific pattern to be recognized and which constitute patterns symmetric to each other. A binary input signal is cut out by the use of the partial pattern cutting out apparatus. The "EXCLUSIVE OR" function between the corresponding bits of the partial patterns obtained from the plurality of cutting out windows are evaluated by "EXCLUSIVE OR" circuits. The number of outputs of predetermined logic level among the outputs of the "EXCLUSIVE OR" circuits and a preset number are compared, and the coincidence between both the numbers is sought. When both numbers coincide, the inputted signal is recognized as being the specific pattern.