Method for identifying objects in motion, in particular vehicles

Details Method for identifying objects in motion, in particular vehicles Method for identifying objects in motion, in particular vehicles

1990-04-02

1992-01-21

Peng, John K.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358108, 358 93, 358107, 358 96, 340942, 364560, H04N 718, H04N 700

Patent

active

050832000

ABSTRACT:
A method for identifying an object in motion, in particular a vehicle, includes several steps whenever the object is moving inside a predetermined identification zone following a predetermined movement axis. The steps are periodically acquiring images of the object in a predetermined field of view, checking the nature of the image background in the field of view to obtain background reference information in the absence of the object, and processing the images acquired in combination with the background reference information in order to extract therefrom a silhouette of the object having crossed the field of view. Systems for implementing the method are also disclosed. The invention may be used, in particular, with highway toll booths and for any other application demanding an identification of vehicles.

REFERENCES:
patent: 2769165 (1956-10-01), Bower
patent: 2967948 (1961-01-01), Pratt
patent: 3488510 (1970-11-01), Raymond et al.
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patent: 4247768 (1981-01-01), Elmer et al.
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patent: 4752764 (1988-06-01), Peterson et al.
patent: 4813004 (1989-03-01), Fujioka et al.
patent: 4947353 (1990-08-01), Quinlan, Jr.
"Optical Sensing and Size Discrimination of Moving Vehicles Using Photocell Array and Threshold Devices", IEEE Transactions on Instrumentation and Measurement, vol. 25, No. 1, Mar. 1976, by T. Takagi, pp. 52-55.

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