Optical vehicle detection system

Details Optical vehicle detection system Optical vehicle detection system

1981-09-29

1984-02-21

Groody, James J.

Communications: electrical

Vehicle detectors

With camera

2502221, 340933, 340942, 358 93, 358108, G08G 100, G08G 104

Patent

active

044333250

ABSTRACT:
An optical vehicle detection system comprising camera means for catching the image of a vehicle running in a selected roadway lane to generate an output video signal, inquiring means for inquiring if the output video signal includes a predetermined shadow signal component, and processing means associated with the inquiring means, if the output video signal includes the predetermined shadow signal component, for processing the output video signal as a signal having a component of shadow cast by a vehicle.

REFERENCES:
patent: 3255434 (1966-06-01), Schwarz
patent: 3685012 (1972-08-01), Case et al.
patent: 4173402 (1979-11-01), Horike et al.
patent: 4214265 (1980-07-01), Olesen
patent: 4258351 (1981-03-01), Shigeta et al.

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