System and method for use of a vehicle back-up camera as a dead-reckoning sensor
First Claim
1. A vehicle navigation system comprising:
- a back-up camera mounted on a rear of a vehicle to provide video data of ground features to the rear of the vehicle to provide back-up camera images to a display in the vehicle and to provide dead reckoning images, wherein a motion of the camera is forward along a line bisecting a horizontal field of view of the camera;
a video dead-reckoning subsystem to correlate the dead reckoning images from the back-up camera for generating an estimated motion of the vehicle; and
a satellite-based navigation system to use the estimated motion of the vehicle to aid in generating a navigation solution for the vehicle.
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Accused Products
Abstract
Systems and methods are disclosed herein to use a vehicle back-up camera as a cost-effective dead-reckoning sensor in satellite-based vehicle navigation systems. Since the back-up camera may already use a display of the navigation system for display, the data from the back-up camera may be easily obtained and integrated into the navigation system. The data from the camera is received by a navigation receiver wirelessly or through a wired connection. The image is processed to determine the speed, heading, turn-rate of the vehicle to aid the satellite-based navigation system if the satellite signals are inadequate. Thus, enhanced vehicle navigation- performance can be obtained without adding new sensors and/or connecting to a vehicle data bus.
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Citations
16 Claims
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1. A vehicle navigation system comprising:
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a back-up camera mounted on a rear of a vehicle to provide video data of ground features to the rear of the vehicle to provide back-up camera images to a display in the vehicle and to provide dead reckoning images, wherein a motion of the camera is forward along a line bisecting a horizontal field of view of the camera; a video dead-reckoning subsystem to correlate the dead reckoning images from the back-up camera for generating an estimated motion of the vehicle; and a satellite-based navigation system to use the estimated motion of the vehicle to aid in generating a navigation solution for the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of providing dead-reckoning data for a vehicle from a back-up camera without a dead-reckoning sensor to aid a satellite-based navigation system, comprising steps executed by a dead-reckoning device:
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receiving video data of ground features to the rear of the vehicle from the back-up camera, wherein a motion of the camera is forward along a line bisecting a horizontal field of view of the camera; sampling the video data in a first frame;
sampling the video data in a second frame;correlating the video data in the first frame with the video data in the second frame to search for a displacement vector; estimating motion data of the vehicle from the displacement vector; and providing the motion data to the satellite-based navigation system. - View Dependent Claims (14, 15, 16)
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Specification