Item counting apparatus

Details Item counting apparatus Item counting apparatus

1981-12-21

1984-11-06

Martin, John C.

Image analysis

Histogram processing

For setting a threshold

377 6, 377 8, 235455, G06K 710, G06K 920, G06M 700, G06M 706

Patent

active

044816677

ABSTRACT:
An electro-optical counter or detecting apparatus for detecting passage of items therepast. A light emitter projects a constantly pulsed beam of light onto the path of the items and light sensors sense the optical energy reflected from such items. One sensor controls the light emitter to so regulate the amount of light emitted by each pulse that the amount of optical energy reflected by the items does not vary as a function of the reflectivity of the surfaces of such items and does not exceed a predetermined level. Another light sensor senses changes in optical energy beyond such predetermined level and thus senses only the passage of an edge of each item past the pulses light beam.

REFERENCES:
patent: 4217491 (1980-08-01), Dufford Jr. et al.
patent: 4250488 (1981-02-01), Haupt
patent: 4296314 (1981-10-01), Dabisch et al.
patent: 4384195 (1983-05-01), Nosler

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