Communications: electrical – Vehicle detectors
Patent
1991-02-27
1994-03-22
Peng, John K.
Communications: electrical
Vehicle detectors
340934, 340937, 340939, 364436, 348149, G08G 101
Patent
active
052968529
ABSTRACT:
A vision processing apparatus and method for detecting and monitoring traffic flow. The method includes the steps of generating successive images of a section of roadway; transducing the successive images into successive arrays of pixels, each pixel having a luminance value associated therewith; summing the luminance values of all pixels contained within a subarray, or "window" in each one of the arrays; comparing the pixel luminance sum for each one of the subarrays to a reference value; and generating data indicative of the presence of traffic in the section of the path when the difference between the pixel luminance sum and the reference value exceeds a predetermined value. The generated data can thereafter be analyzed to determine various traffic and vehicle parameters, or can be used to operate traffic control devices.
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1985 IEEE, Traffic Monitoring and Control Using Machine Vision A Survey by Rafael M. Inigo pp. 177-185.
"Development of a Breadboard System For Wide Area Vehicle Detection" by Panos G. Michalopoulus, Robert Fitch and Blake Wolf, Proceedings of the Forty-Second Annual Ohio Transportation Engineering Conference, Nov. 29-30, 1988, Columbus, Ohio.
Peng John K.
Stover James M.
Tong Nina
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