PRINT READER DESIGNED ON OPTICAL CORRELATION PRINCIPLE,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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A prototype of a reading automaton based on optical correlation is described. It operates in conjunction with the Kiev computer and is designated for the recognition of numbers typed by the Moskva typewriter. The algorithm is based on the correlation method for standard pattern recognition developed at Institute of Cybernetics, An UkrSSR. The modeling of this approach on computers showed a high level of recognition in presence of poor quality of typing. The article outlines the principle optical correlation and describes the experimental setup. A description is also given of the realization of the shifts of the pattern under study relative to the standards, the block diagram of the reading automaton and the Kiev computer, and the machine algorithm. The tests showed that 1 the proposed simple setup secures a reasonably reliable operation 2 the experimental results are in good agreement with the modeling results 3 the speed is limited by the paper advancing rate of the drum 3000 rpm 4 the recognition process organization requires the use of special memories and 5 the major shortcoming is the relatively slow rate of the mechanical sign shifts.
- Computer Hardware