Pattern recognition system
First Claim
1. A pattern recognition system for recognizing a specific pattern having at least first and second symmetrical portions from a binary representation of a subject pattern, comprisingfirst means for detecting those portions of binary signal representing the subject pattern which are located at the positions of said first and second symmetrical portions in the pattern to be recognized.second means responsive to said first means for effecting an EXCLUSIVE OR operation between said detected pattern portions, andthird means responsive to the output of said second means for indicating whether the signal obtained from said second means designated recognition of said specific pattern.
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Abstract
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.
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Citations
11 Claims
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1. A pattern recognition system for recognizing a specific pattern having at least first and second symmetrical portions from a binary representation of a subject pattern, comprising
first means for detecting those portions of binary signal representing the subject pattern which are located at the positions of said first and second symmetrical portions in the pattern to be recognized. second means responsive to said first means for effecting an EXCLUSIVE OR operation between said detected pattern portions, and third means responsive to the output of said second means for indicating whether the signal obtained from said second means designated recognition of said specific pattern.
Specification