Pattern recognition apparatus using oscillating memory circuits

Details Pattern recognition apparatus using oscillating memory circuits Pattern recognition apparatus using oscillating memory circuits

1989-02-23

1989-12-19

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 17, 382 64, G06K 948

Patent

active

048888141

ABSTRACT:
A pattern recognition system comprises first and second cell blocks each composed of a number of nonlinear oscillators arranged in a multi-layer matrix. The nonlinear oscillators in each layer of the first cell block are coupled so as to be excited by a corresponding bit of a two-dimensional bit pattern, and are coupled to adjacent nonlinear oscillators in the same layer so as to mutually emphasize the oscillation in a predetermined direction different from those predetermined for the other layers, so that in each of the layers, there are selectively excited the nonlinear oscillators corresponding to a continuous line segment contained in the bit pattern and aligned in the excitation emphasizing direction of that layer. On the other hand, the nonlinear oscillators in each layer of the second cell block are coupled to a corresponding group of a plurality of nonlinear oscillators of a corresponding layer of the first cell block and are coupled to adjacent nonlinear oscillators in the same layer such that in each of the layers, there are selectively excited only the nonlinear oscillators corresponding to an end of a continuous line segment contained in the bit pattern. A memory composed of a plurality of nonlinear oscillators is selectively excited by the exciting nonlinear oscillators of the first and second cell blocks, whereby the nonlinear oscillators corresponding to an exciting pattern of the exciting nonlinear oscillators of the first and second cell blocks oscillate at a frequency inherent to a given pattern.

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patent: 3509534 (1970-04-01), Partin
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patent: 4710964 (1987-12-01), Yamaguchi et al.
patent: 4747152 (1988-05-01), Knutsson et al.
patent: 4760603 (1988-07-01), Tsuda et al.

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