Apparatus for measuring the dynamic state of traffic

Details Apparatus for measuring the dynamic state of traffic Apparatus for measuring the dynamic state of traffic

1992-02-03

1994-04-05

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 48, 382 50, 364436, 340937, G08G 1048, G06F 1566

Patent

active

053012399

ABSTRACT:
In an apparatus for measuring the dynamic state of traffic, a video camera unit picks up images of traffic on the road. The picture information is temporarily stored in memory units, and then processed by an image processing unit. The image processing unit controls the rate for updating background data determines whether it is daytime, dusk or night, and controls a threshold value for processing images. Further, the updating of the background data is made accurate and the extraction or identification of running vehicles is facilitated by employing a background differential system and a frame differential system. The output is transferred to a CPU to be utilized as a source of traffic information or for scheduling travelling time.

REFERENCES:
patent: 4433325 (1984-02-01), Tanaka et al.
patent: 4847772 (1989-07-01), Michalopoulos et al.
patent: 5109435 (1992-04-01), Lo et al.
patent: 5150426 (1992-09-01), Banh et al.
patent: 5161107 (1992-11-01), Mayeaux et al.

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