Tire detection for accurate vehicle speed estimation
First Claim
1. A computer-implemented method for determining the speed of a motor vehicle in a vehicle speed detection system, the method comprising:
- receiving a plurality of images of a motor vehicle traveling on a road, each of the images being separated in time by a known interval;
determining, for each of at least two of the images, a position of a license plate, a light fixture on the vehicle, or both the license plate and the light fixture on the vehicle;
determining, for each of at least two of the images, a point of contact where a same tire of the vehicle contacts a surface of the road based, in part, on one or more identified features of the vehicle in one or more of the plurality of images based on the position of the license plate, the light fixture on the vehicle, or both the license plate and the light fixture on the vehicle that was determined; and
using the points of contact and the time interval separations to calculate a speed at which the vehicle is traveling on the road.
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Accused Products
Abstract
In some aspects of the present application, a computer-implemented method for determining the speed of a motor vehicle in a vehicle speed detection system is disclosed. The method can include receiving a plurality of images of a motor vehicle traveling on a road, each of the images being separated in time by a known interval; determining, for each of at least two of the images, a point of contact where a same tire of the vehicle contacts a surface of the road based, in part, on one or more identified features of the vehicle in one or more of the plurality of images; and using the points of contact and the time interval separations to calculate a speed at which the vehicle is traveling on the road.
5 Citations
18 Claims
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1. A computer-implemented method for determining the speed of a motor vehicle in a vehicle speed detection system, the method comprising:
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receiving a plurality of images of a motor vehicle traveling on a road, each of the images being separated in time by a known interval; determining, for each of at least two of the images, a position of a license plate, a light fixture on the vehicle, or both the license plate and the light fixture on the vehicle; determining, for each of at least two of the images, a point of contact where a same tire of the vehicle contacts a surface of the road based, in part, on one or more identified features of the vehicle in one or more of the plurality of images based on the position of the license plate, the light fixture on the vehicle, or both the license plate and the light fixture on the vehicle that was determined; and using the points of contact and the time interval separations to calculate a speed at which the vehicle is traveling on the road. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for determining the speed of a motor vehicle in a vehicle speed detection system, the system comprising:
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an imaging system; and a processor in communication with said video camera system and a memory, said processor executing machine readable instructions for performing; receiving images captured using the imaging system, each of the images being separated in time by a known interval; determining, for each of at least two of the images, a position of a license plate, a light fixture on the vehicle, or both the license plate and the light fixture on the vehicle; determining, for each of at least two of the images, a point of contact where a same tire of the vehicle contacts a surface of the road based on the position of the license plate, the light fixture on the vehicle, or both the license plate and the light fixture on the vehicle that was determined; using the points of contact and the time interval separations to calculate a speed at which the vehicle is traveling on the road. - View Dependent Claims (11, 12, 13, 14)
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15. A computer implemented method for determining the speed of a motor vehicle in a vehicle speed detection system, the method comprising:
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receiving a plurality of images of a moving vehicle, the images captured at known time intervals with each of the images being separated in time by a known interval, said images having been captured using an imaging system; determining, for each of at least two of the images, a position of a license plate, a light fixture on the vehicle, or both the license plate and the light fixture on the vehicle; determining, for each of at least two of the images, a point of contact where a same tire of the vehicle contacts a surface of the road based on the position of the license plate, the light fixture on the vehicle, or both the license plate and the light fixture on the vehicle that was determined; using the points of contact and the time interval separations to calculate a speed at which the vehicle is traveling on the road. - View Dependent Claims (16, 17, 18)
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Specification