Method and system for vehicle classification
First Claim
Patent Images
1. A method for classification of vehicles comprising:
- (a) calibrating a transformation angle between a camera image and a road surface;
(b) detecting moving objects on the road surface in the camera image;
(c) establishing a vertical axis of symmetry for each of the moving objects;
(d) detecting dominant horizontal edges intersecting with the vertical axis of symmetry for each of the moving objects;
(e) tracking the dominant horizontal edges for a plurality of consecutive video frames;
(f) projecting each of the dominant horizontal edges onto a ground plane;
(g) treating each pair of adjacent projected edges as a projected surface;
(h) calculating changes in the projected surface; and
(i) calculating distinct structural signatures from the changes in the projected surfaces.
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Abstract
A method and system of vehicle classification, and more particularly to a method and system called hierarchical vehicle classification system using a video and/or video image, a method and system of vehicle classification using a vehicle ground clearance measurement system, and method and system for classification of passenger vehicles and measuring their properties, and more particularly to capturing a vehicle traveling along a road from a single camera and classifying the vehicle into a vehicle class.
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Citations
19 Claims
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1. A method for classification of vehicles comprising:
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(a) calibrating a transformation angle between a camera image and a road surface; (b) detecting moving objects on the road surface in the camera image; (c) establishing a vertical axis of symmetry for each of the moving objects; (d) detecting dominant horizontal edges intersecting with the vertical axis of symmetry for each of the moving objects; (e) tracking the dominant horizontal edges for a plurality of consecutive video frames; (f) projecting each of the dominant horizontal edges onto a ground plane; (g) treating each pair of adjacent projected edges as a projected surface; (h) calculating changes in the projected surface; and (i) calculating distinct structural signatures from the changes in the projected surfaces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for classification of vehicles comprising:
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a camera for capturing images of at least one moving object; and a computer processing unit, which performs the following steps; (a) calibrating a transformation angle between a camera image and a road surface; (b) detecting moving objects on the road surface in the camera image; (c) establishing a vertical axis of symmetry for each of the moving objects; (d) detecting dominant horizontal edges intersecting with the vertical axis of symmetry for each of the moving objects; (e) tracking the dominant horizontal edges for a plurality of consecutive video frames; (f) projecting each of the dominant horizontal edges onto a ground plane; (g) treating each pair of adjacent projected edges as a projected surface; (h) calculating changes in the projected surface; and (i) calculating distinct structural signatures from the changes in the projected surfaces. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A computer program product comprising a non-transitory computer usable medium having a computer readable code embodied therein for classification of passenger vehicles and measuring their properties from a rear view video frame, the computer readable program code is configured to execute a process, which includes the steps of:
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(a) calibrating a transformation angle between a camera image and a road surface; (b) detecting moving objects on the road surface in the camera image; (c) establishing a vertical axis of symmetry for each of the moving objects; (d) detecting dominant horizontal edges intersecting with the vertical axis of symmetry for each of the moving objects; (e) tracking the dominant horizontal edges for a plurality of consecutive video frames; (f) projecting each of the dominant horizontal edges onto a ground plane; (g) treating each pair of adjacent projected edges as a projected surface; (h) calculating changes in the projected surface; and (i) calculating distinct structural signatures from the changes in the projected surfaces. - View Dependent Claims (16, 17, 18, 19)
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Specification