DETECTION AND DOCUMENTATION OF TAILGATING AND SPEEDING VIOLATIONS
First Claim
1. A computerized method for determining that a trailing vehicle is tailgating a lead vehicle while both are traveling on a lane of a road with the trailing vehicle following the lead vehicle, the method comprising:
- while a camera is mounted on a moving host vehicle and connected to a processor, capturing from a camera a timed sequence of image frames at known capture times of the lead vehicle and the trailing vehicle;
selecting from the captured image frames selected images of at least a part of the trailing vehicle and at least of part of the lead vehicle, thereby providing respective image coordinates of the trailing vehicle and the lead vehicle in the selected images;
computing responsive to the image coordinates in the selected image frames a plurality of respective world space differential distances between the trailing vehicle and the lead vehicle; and
determining a tailgating metric responsive to the known capture times of the selected image frames and the computed world space differential distances.
2 Assignments
0 Petitions
Accused Products
Abstract
Determining that a trailing vehicle is tailgating a lead vehicle while both are traveling on a lane of a road. A camera captures a timed sequence of image frames at known capture times of the lead vehicle and the trailing vehicle. Images of the trailing vehicle and the lead vehicle are selected from the captured image frames to provide respective image coordinates of the trailing vehicle and the lead vehicle. Multiple world space differential distances between the trailing vehicle and the lead vehicle are computed responsive to the image coordinates in the selected image frames. A tailgating metric responsive to the known capture times of the selected image frames and the computed world space differential distances is determined.
22 Citations
18 Claims
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1. A computerized method for determining that a trailing vehicle is tailgating a lead vehicle while both are traveling on a lane of a road with the trailing vehicle following the lead vehicle, the method comprising:
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while a camera is mounted on a moving host vehicle and connected to a processor, capturing from a camera a timed sequence of image frames at known capture times of the lead vehicle and the trailing vehicle; selecting from the captured image frames selected images of at least a part of the trailing vehicle and at least of part of the lead vehicle, thereby providing respective image coordinates of the trailing vehicle and the lead vehicle in the selected images; computing responsive to the image coordinates in the selected image frames a plurality of respective world space differential distances between the trailing vehicle and the lead vehicle; and determining a tailgating metric responsive to the known capture times of the selected image frames and the computed world space differential distances. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system including a camera and processor, the system while mounted on a moving host vehicle for determining that a trailing vehicle is tailgating a lead vehicle while both are traveling on a lane of a road with the trailing vehicle following the lead vehicle, the system operable to:
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capture from a camera a timed sequence of image frames at known capture times of the lead vehicle and the trailing vehicle; select from the captured image frames selected images of at least a part of the trailing vehicle and at least of part of the lead vehicle, thereby providing respective image coordinates of the trailing vehicle and the lead vehicle in the selected images; compute responsive to the image coordinates in the selected image frames a plurality of respective world space differential distances between the trailing vehicle and the lead vehicle; and determine a tailgating metric responsive to the known capture times of the selected image frames and the computed world space differential distances.
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15. A system while mounted on a moving host vehicle for determining that a trailing vehicle is tailgating a lead vehicle while both the trailing vehicle and the lead vehicle are traveling on a lane of a road with the trailing vehicle following the lead vehicle, the system comprising:
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multiple cameras mountable on the host vehicle with overlapping fields of view; a processor configured to capture from the cameras timed sequences of image frames at known capture times of the lead vehicle and the trailing vehicle, wherein the capture of the timed sequences of images frames are synchronized, wherein the processor is further configured to; input speeds of the host vehicle; select from the captured image frames corresponding image points between the synchronized image frames of at least a part of the trailing vehicle and at least of part of the lead vehicle to provide thereby respective image coordinates of the trailing vehicle and the lead vehicle in at least a portion of the captured image frames; compute responsive to the image coordinates of the corresponding image points in the synchronized image frames a plurality of world space differential distances between the trailing vehicle and the lead vehicle; and determine a tailgating metric responsive to the known capture times of the selected image frames, the computed world space differential distances and the speeds of the host vehicle.
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16. A computerized method for determining speed of a target vehicle moving in a lane of a road, the method comprising:
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while a camera is mounted on a moving host vehicle and connected to a processor, capturing from a camera a timed sequence of image frames at known capture times of the target vehicle; selecting images of at least a part of the target vehicle to provide respective image coordinates of the vehicle in the selected images; computing world space coordinates (X,Z) from the image coordinates; and determining the speed of the target vehicle responsive to the known capture times of the selected image frames and the world space coordinates. - View Dependent Claims (17, 18)
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Specification