Device for measuring the number of pass persons and a management

Details Device for measuring the number of pass persons and a management Device for measuring the number of pass persons and a management

1997-06-09

1999-07-20

Wambach, Margaret R.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Counting animate or inanimate entities

377 10, G06M 700

Patent

active

059265183

ABSTRACT:
A device for measuring the number of persons without any affection by overlap of persons in any direction, sunlight variations, shadows, or the like includes a plurality of cameras arranged in parallel with respect to their optical axes for taking an image in a measuring area to measure the number of persons, an extraction unit for extracting a person based on image data taken by said plurality of cameras, a trace unit for tracing the person extracted by the extraction unit, and a decision unit for deciding whether or not a decision line is passed based on the data produced by the trace unit and to increase the number of passing persons when the line is passed. In the extraction unit, the persons overlapping in a depth direction can be precisely separated by employing space coordinate data by correspondence in a plurality of images taken by the plurality of cameras at the same timing. The decision unit decides that one person has passed when initial and end points of a translation locus of the person are respectively positioned on both sides of the decision line set in a gateway.

REFERENCES:
patent: 4303851 (1981-12-01), Mottier
patent: 4847485 (1989-07-01), Koelsch

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