Apparatus for measuring the dynamic state of traffic
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United States of America Patent
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Apr 5, 1994
Grant Date -
N/A
app pub date -
Feb 3, 1992
filing date -
Feb 18, 1991
priority date (Note) -
Expired
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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.
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