Image analysis – Histogram processing – For setting a threshold
Patent
1990-05-09
1991-10-08
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
382 18, G06K 900
Patent
active
050561472
ABSTRACT:
Apparatus and methods are disclosed for recognizing patterns, i.e., comparing a stored pattern with a pattern to be measured. The apparatus is taught a stored or reference pattern by assigning a first binary value to each of a plurality of addressable data stores at locations selected by applying respective sets of values to the stores, the values representing characteristics of the stored pattern. A second binary value is assigned to all locations not selected. The pattern to be measured has sets of values representing characteristics thereof applied to respective addresses of the addressable data stores. The contents of the selected addresses are read and the binary values from the selected addresses are applied to a network capable of providing an output signal representing a selected binary value only when the first binary value is read from all selected locations. The output signal represents the result of the measurement and may provide a measure of the closeness of the stored and observed patterns.
REFERENCES:
patent: 3382482 (1968-05-01), Greenly
patent: 3639902 (1972-02-01), Dietrich
patent: 3652991 (1972-03-01), Dietrich
patent: 3868635 (1975-02-01), Shah et al.
"Guide to Pattern Recognition Using Random-Access Memories," I. Aleksander, Computers and Digital Techniques, Feb. 1979, vol. 2, No. 1, pp. 29-40.
Lilley John B.
Turner Stephen J.
Boudreau Leo H.
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