Centerline method for trailer hitch angle detection
First Claim
Patent Images
1. A system for detecting a hitch angle between a vehicle and a trailer, comprising:
- an imaging device configured to capture images of the trailer; and
circuitry configured to;
process the captured images;
derive an edge map and identify trailer pixels therein;
define a number of candidate lines projecting from a common projection point in the edge map; and
determine the hitch angle based on an angle between a selected candidate line and a reference line wherein the candidate lines are derived based on a width of a rear vehicle bumper, a drawbar length, and a trailer length;
wherein the reference line extends along a middle column of the edge map and intersects an imaged hitch point between the vehicle and the trailer.
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Abstract
A system for detecting a hitch angle between a vehicle and a trailer is provided herein. An imaging device is configured to capture images of the trailer and a controller is configured to process the captured images. The controller derives an edge map and identifies trailer pixels therein. The controller defines a number of candidate lines in the edge map and determines the hitch angle based on an angle between a selected candidate line and a reference line.
388 Citations
14 Claims
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1. A system for detecting a hitch angle between a vehicle and a trailer, comprising:
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an imaging device configured to capture images of the trailer; and circuitry configured to; process the captured images; derive an edge map and identify trailer pixels therein; define a number of candidate lines projecting from a common projection point in the edge map; and determine the hitch angle based on an angle between a selected candidate line and a reference line wherein the candidate lines are derived based on a width of a rear vehicle bumper, a drawbar length, and a trailer length;
wherein the reference line extends along a middle column of the edge map and intersects an imaged hitch point between the vehicle and the trailer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of detecting a hitch angle between a vehicle and a trailer, comprising the steps of:
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capturing images of the trailer using an imaging device; providing circuitry for; processing the captured images; deriving an edge map and identifying trailer pixels therein; defining a number of candidate lines in the edge map; and determining the hitch angle based on an angle between a selected candidate line and a reference line indicating a predetermined hitch angle wherein the candidate lines are derived based on a width of a rear vehicle bumper, a drawbar length, and a trailer length;
wherein the reference line extends along a middle column of the edge map and intersects an imaged hitch point between the vehicle and the trailer. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification