Barrier and guardrail detection using a single camera
First Claim
1. A method of detection of a structural barrier extending along a road, the method performed by a driver assistance system mountable in a host vehicle, wherein the driver assistance system includes a camera operatively connectible to a processor, the method comprising:
- capturing a plurality of image frames in the forward field of view of the camera;
in the image frames, locating an image patch suspected to include an image of part of a structural barrier; and
processing image motion of said image patch of the structural barrier to compute a lateral distance between the host vehicle and said image patch using the image motion of said image patch and motion of the host vehicle, the image motion of said image patch comprising mapping coordinates of an image from image frame to image frame or a function of the mapping, thereby detecting the structural barrier while avoiding use of a second sensor other than the camera to sense the structural barrier.
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Accused Products
Abstract
Driver assistance systems for detecting a structural barrier extending along a road. The driver assistance system may be mountable in a host vehicle. The camera may capture multiple image frames in the forward field of view of the camera. A processor may process motion of images of the barrier in the image frames. The camera may be a single camera. The motion of the images may be responsive to forward motion of the host vehicle and/or the motion of the images may be responsive to lateral motion of the host vehicle.
119 Citations
21 Claims
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1. A method of detection of a structural barrier extending along a road, the method performed by a driver assistance system mountable in a host vehicle, wherein the driver assistance system includes a camera operatively connectible to a processor, the method comprising:
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capturing a plurality of image frames in the forward field of view of the camera; in the image frames, locating an image patch suspected to include an image of part of a structural barrier; and processing image motion of said image patch of the structural barrier to compute a lateral distance between the host vehicle and said image patch using the image motion of said image patch and motion of the host vehicle, the image motion of said image patch comprising mapping coordinates of an image from image frame to image frame or a function of the mapping, thereby detecting the structural barrier while avoiding use of a second sensor other than the camera to sense the structural barrier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A driver assistance system for detecting a structural barrier extending along a road, wherein the driver assistance system is mountable in a host vehicle, the driver assistance system comprising:
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a camera operable to capture a plurality of image frames in the forward field of view; and a processor operatively connected to the camera, wherein the processor is operable to process in the image frames image motion of an image patch suspected to be an image of part of a barrier to compute a lateral distance between the host vehicle and said image patch using the image motion of said image patch and motion of the host vehicle, the image motion of said image patch comprising mapping coordinates of an image from image frame to image frame or a function of the mapping, to detect the barrier while avoiding use of a second sensor other than the camera to sense the structure barrier. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification