Estimating distance to an object using a sequence of images recorded by a monocular camera
First Claim
Patent Images
1. A system for determining a distance from a moving vehicle to an object ahead of the moving vehicle, comprising:
- a processor configured to;
receive, from an image capturing device mounted on the moving vehicle, a first image including a first representation of the object, a second image including a second representation of the object, and a third image including a third representation of the object;
measure a first dimension of the first representation of the object in the first image and a second dimension of the second representation of the object in the second image;
determine an actual dimension of the object based on the measured first dimension and the measured second dimension, wherein the processor is configured to determine the actual dimension of the object by;
determining a first actual dimension based on the measured first dimension, a height of the image capturing device relative to a road surface, and a first distance from the horizontal edge to a horizontal reference line measured in the first image;
determining a second actual dimension based on the measured second dimension, the height of the image capturing device relative to the road surface, and a second distance from the horizontal edge to the horizontal reference line measured in the second image; and
determining the actual dimension based on the first actual dimension and the second actual dimension;
measure a third dimension of the third representation of the object in the third image;
determine the distance from the moving vehicle to the object based on the measured third dimension and the actual dimension; and
provide a warning to a driver of the moving vehicle based on the distance.
2 Assignments
0 Petitions
Accused Products
Abstract
A method for monitoring headway to an object performable in a computerized system including a camera mounted in a moving vehicle. The camera acquires in real time multiple image frames including respectively multiple images of the object within a field of view of the camera. An edge is detected in in the images of the object. A smoothed measurement is performed of a dimension the edge. Range to the object is calculated in real time, based on the smoothed measurement.
34 Citations
20 Claims
-
1. A system for determining a distance from a moving vehicle to an object ahead of the moving vehicle, comprising:
a processor configured to; receive, from an image capturing device mounted on the moving vehicle, a first image including a first representation of the object, a second image including a second representation of the object, and a third image including a third representation of the object; measure a first dimension of the first representation of the object in the first image and a second dimension of the second representation of the object in the second image; determine an actual dimension of the object based on the measured first dimension and the measured second dimension, wherein the processor is configured to determine the actual dimension of the object by; determining a first actual dimension based on the measured first dimension, a height of the image capturing device relative to a road surface, and a first distance from the horizontal edge to a horizontal reference line measured in the first image; determining a second actual dimension based on the measured second dimension, the height of the image capturing device relative to the road surface, and a second distance from the horizontal edge to the horizontal reference line measured in the second image; and determining the actual dimension based on the first actual dimension and the second actual dimension; measure a third dimension of the third representation of the object in the third image; determine the distance from the moving vehicle to the object based on the measured third dimension and the actual dimension; and provide a warning to a driver of the moving vehicle based on the distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
11. A method for determining a distance from a moving vehicle to an object ahead of the moving vehicle, comprising:
-
receiving, from an image capturing device, a first image including a first representation of the object, a second image including a second representation of the object, and a third image including a third representation of the object; measuring, by a processing unit, a first dimension of first representation of the object in the first image and a second dimension of the second representation of the object in the second image; determining, by the processing unit, an actual dimension of the object based on the measured first dimension and the measured second dimension, wherein determining the actual dimension comprises; determining a first actual dimension based on the measured first dimension, a height of the image capturing device relative to a road surface, and a first distance from the horizontal edge to a horizontal reference line measured in the first image; determining a second actual dimension based on the measured second dimension, the height of the image capturing device relative to the road surface, and a second distance from the horizontal edge to the horizontal reference line measured in the second image; and determining the actual dimension based on the first actual dimension and the second actual dimension; measuring, by the processing unit, a third dimension of the third representation of the object in the third image; determining, by the processing unit, the distance from the moving vehicle to the object based on the measured third dimension and the actual dimension; and providing a warning to a driver of the moving vehicle based on the distance. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification