Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1995-04-14
1995-11-21
Williams, Hezron E.
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
348148, 348135, 348169, 340937, G01C 2500
Patent
active
054676347
ABSTRACT:
A calibration apparatus for calibrating three-dimensional space for a machine vision system and a method for using the calibration apparatus for calibrating the machine vision system are disclosed. The calibration apparatus comprises pairs of indicators, such as lights, mounted on a frame, each pair of lights separated by a known horizontal distance. The calibration apparatus may be mounted on the back of a vehicle that moves the apparatus through a roadway scene at a known speed. A machine vision system tracks the calibration apparatus, specifically the pairs of lights mounted on the frame, and maps the pixel space of the machine vision system to three-dimensional space.
REFERENCES:
patent: D310793 (1990-09-01), Castagna
patent: 3088022 (1963-04-01), Schmidt
patent: 3112888 (1963-12-01), McKenzie
patent: 3487359 (1969-12-01), McClintock
patent: 3685012 (1972-08-01), Case et al.
patent: 3924107 (1975-12-01), Sakai
patent: 3986007 (1976-10-01), Ruoff, Jr.
patent: 4044377 (1977-08-01), Bowerman
patent: 4152854 (1979-05-01), Berry, Jr. et al.
patent: 4180010 (1979-12-01), McDermott et al.
patent: 4232456 (1980-11-01), Harmon et al.
patent: 4396942 (1983-08-01), Gates
patent: 4695892 (1987-09-01), Mary
patent: 4835515 (1989-05-01), McDermott et al.
patent: 4839648 (1989-06-01), Beucher et al.
patent: 4847772 (1989-07-01), Michalopoulos et al.
patent: 4893922 (1990-01-01), Eichweber
patent: 4994681 (1991-02-01), Mann
patent: 5073819 (1991-12-01), Gates
patent: 5134661 (1992-07-01), Reinsch
patent: 5295073 (1994-03-01), Celette
patent: 5296852 (1994-03-01), Rathi
Inigo; "Application of Machine Vision to Traffic Monitoring and Control"; IEEE Transactions on Vehicular Technology; vol. 38, No. 3, Aug., 1989.
Kobatake et al.; "Measurement of Two-Dimensional Movement of Traffic By Image Processing"; Proceedings: ICASSP 87, 1987 International Conference on acoustics, speech, and signal processing; Dallas, Tex., Apr. 6-9, 1987.
Brady Mark J.
Cerny Darin G.
Griswold Gary L.
Kirn Walter N.
Larkin Daniel S.
Minnesota Mining and Manufacturing Company
Ouyang Michael K.
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