Communications: electrical – Vehicle detectors – With camera
Patent
1993-04-27
1995-03-28
Peng, John K.
Communications: electrical
Vehicle detectors
With camera
340933, 364436, 367 97, 377 9, 382 48, 382 43, 382 1, 382 22, 382 54, G08G 1017
Patent
active
054021189
ABSTRACT:
This invention aims at providing an traffic flow measurement method and apparatus attaining the stable measurement without being affected by the change in the brightness of the external environment such as daytime vehicle front, et al. In order to achive the above object, the traffic flow measurement apparatus for practicing the traffic flow measurement method comprises image input unit for receiving image information derived from the ITV camera, detection unit for detecting sampling points which are candidates for a vehicle fronts in a measurement area, and measurement processing unit for determining a position of the vehicle front in the measurement area from the candidate points detected by the detection unit. The measurement processing unit calculates a vehicle velocity based on a change between a position of the vehicle front derived from past image information and a current position of the vehicle front.
REFERENCES:
patent: 4214265 (1980-07-01), Olesen
patent: 4245633 (1988-05-01), Waksman et al.
patent: 4433325 (1984-02-01), Tanaka et al.
patent: 4449144 (1984-05-01), Suzuki
patent: 4847772 (1989-07-01), Michalopoulos et al.
patent: 4881270 (1989-11-01), Knecht et al.
patent: 4985618 (1991-01-01), Inada et al.
patent: 5034986 (1991-07-01), Karmann et al.
patent: 5091967 (1992-02-01), Ohsawa
patent: 5212740 (1993-05-01), Paek et al.
patent: 5243663 (1993-09-01), Kudoh
Sumitomo Electric Technical Review, vol. 25, Sep. 1985, pp. 58-62.
N. Hashimoto, et al., "Development of an Image-Processing Traffic Flow Measuring System", Sumitomo Electric Technical Review, No. 25, Jan., 1986, pp. 133-138.
Peng John K.
Sumitomo Electric Industries Ltd.
Tong Nina
LandOfFree
Method and apparatus for measuring traffic flow does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for measuring traffic flow, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring traffic flow will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2253647