Image analysis – Histogram processing – For setting a threshold
Patent
1986-07-07
1987-12-01
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
382 21, 382 29, 365 94, G06K 948
Patent
active
047109645
ABSTRACT:
A pattern recognition apparatus includes a pattern preprocessing part having a plurality of outputs, and a clock oscillator, an information consolidator and a memory having a plurality of nonlinear oscillating circuits, respectively. Each of the oscillating circuits includes a plurality of inputs for controlling the oscillation condition and at least one output. In the information consolidator, the output of each oscillating circuit is interconnected to predetermined inputs of other oscillating circuits in a predetermined relation, and the inputs of the oscillating circuits are coupled to the outputs of the pattern preprocessing part in a predetermined distribution. The clock oscillator receives, as a main exciting signal, the sum of a group of signals obtained by phase-adjusting the output of a substantial part of oscillating circuits contained in the information consolidator. In the memory, the respective oscillating circuits receive as a main exciting signal the output of the clock oscillator, and these oscillating circuits are divided into a predetermined number of groups so that the sum of the outputs of the oscillating circuits in each group gives an elementary signal of a pattern reference memory data. In addition, there is provided a waveform comparator for comparing the elementary signal of the memory data with the direct sum of the outputs of the above mentioned substantial part of oscillating circuits in the information consolidator, so that the result of comparison is applied to inputs of the oscillating circuits of the memory.
REFERENCES:
patent: 3297993 (1963-12-01), Clapper
patent: 3332064 (1967-07-01), Marsch
patent: 3482211 (1969-12-01), De Claris et al.
patent: 3509534 (1970-04-01), Partin
patent: 3629849 (1971-12-01), Sauvan
Okumura Tokiko
Shimizu Hiroshi
Tsuda Ichiro
Yamaguchi Youko
Yano Masafumi
Boudreau Leo H.
Brim Steven
Research Development Corporation of Japan
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