Image analysis – Applications – Vehicle or traffic control
Patent
1994-07-06
1996-12-31
Couso, Yon J.
Image analysis
Applications
Vehicle or traffic control
348149, G06K 900
Patent
active
055902170
ABSTRACT:
The present invention provides vehicle activity data by accurately measuring and collecting traffic information, such as vehicle speed, number of passing vehicles, types such as small size and large size of the vehicles. The invention allows tracing of a vehicle which makes a lane change, avoids influence of a large size vehicle for measurement in an adjacent lane, and provides an approach for obtaining vehicle activity data at night time or in the rain. The apparatus stores video information from a video camera in image memories. The stored current image data and background data are processed by an image processing section to assign identification number for respective individual vehicles. Results of tracing include a position of the front end of the vehicle in a measuring area, a vehicle width, and both end positions of the vehicle are stored in time sequence. A computer calculates speed over one second for respective processed frames on the basis of vehicle position information for a given number of preceding frames, provides weights for respective calculated speeds and performs averaging for deriving an accurate vehicle speed.
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Yasuo Kudo; Traffic flow measurement system using image processing; Jan. 17, 86; 11 pages (pp. 62-72).
Tomasz Abramczuk; A microcomputer based TV-detector for road traffic 1984; 10 pages.
P. G. Michalopoulos & R. Fitch; Development of a wide area vehicle detector through video image processing; 1986; 6 pages (52-57).
Couso Yon J.
Matsushita Electric - Industrial Co., Ltd.
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