Method for detecting road slope and system for controlling vehicle speed using the method
First Claim
1. A method for detecting road slope comprising the steps of:
- (a) receiving input of road images from a camera;
(b) performing conversion of the road images into a bird'"'"'s-eye view;
(c) extracting a plurality of lane markers from the converted road images;
(d) calculating a slope in the extracted lane markers; and
(e) calculating a slope in the road using a difference in value between the slopes.
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Abstract
Disclosed is a method for detecting road slope and a system for controlling vehicle speed using the method. The method comprises the steps of receiving input of road images from a camera; performing conversion of the road images into a bird'"'"'s-eye view; extracting a plurality of lane markers from the converted road images; calculating a slope in the extracted lane markers; and calculating a slope in the road using a difference in value between the slopes. The system comprises a vehicle speed setting unit for establishing a target vehicle speed and outputting the same; a camera for obtaining road images and outputting the same; a drive state detecting unit having a plurality of sensors for detecting a vehicle drive state; an actuator unit for performing specific automatic controls of the vehicle; and a control unit for performing the method of the present invention to detect a road slope, and controlling the actuator unit according to road slope detection results such that the vehicle is maintained at the established speed.
67 Citations
12 Claims
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1. A method for detecting road slope comprising the steps of:
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(a) receiving input of road images from a camera;
(b) performing conversion of the road images into a bird'"'"'s-eye view;
(c) extracting a plurality of lane markers from the converted road images;
(d) calculating a slope in the extracted lane markers; and
(e) calculating a slope in the road using a difference in value between the slopes. - View Dependent Claims (2, 3, 4)
determining if a steering angle is within a predetermined range by receiving input from a steering angle sensor, wherein the steering angle determination may be performed before any of the steps (a)-(e), and wherein if it is determined that the steering angle falls outside the predetermined range, remaining steps of the method are not performed.
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5. A method for detecting road slope comprising the steps of:
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(a) receiving input of road images from a camera;
(b) extracting a plurality of lane markers from the converted road images;
(c) performing bird'"'"'s-eye view conversion of the images in which lane markers have been extracted. (d) calculating a slope in the extracted lane markers; and
(e) calculating a slope in the road using a difference in value between the slopes. - View Dependent Claims (6, 7, 8)
determining if a steering angle is within a predetermined range by receiving input from a steering angle sensor, wherein the steering angle determination may be performed before any of the steps (a)-(e), and wherein if it is determined that the steering angle falls outside the predetermined range, remaining steps of the method are not performed.
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9. A system for controlling vehicle speed comprising:
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a vehicle speed setting unit for establishing a target vehicle speed and outputting the same;
a camera for obtaining road images and outputting the same;
a drive state detecting unit having a plurality of sensors for detecting a vehicle drive state;
an actuator unit for performing specific automatic controls of the vehicle; and
a control unit for detecting a road slope, and controlling the actuator unit according to road slope detection results such that the vehicle is maintained at the established speed, wherein the detecting a road slope comprises;
receiving input of road images from a camera;
performing conversion of the road images into a bird'"'"'s-eye view;
extracting a plurality of lane markers from the converted road images;
calculating a slope in the extracted lane markers; and
calculating a slope in the road using a difference in value between the slopes. - View Dependent Claims (10, 11)
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12. A system for controlling vehicle speed comprising:
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a vehicle speed setting unit for establishing a target vehicle speed and outputting the same;
a camera for obtaining road images and outputting the same;
a drive state detecting unit having a plurality of sensors for detecting a vehicle drive state;
an actuator unit for performing specific automatic controls of the vehicle; and
a control unit for detecting a road slope, and controlling the actuator unit according to road slope detection results such that the vehicle is maintained at the established speed, wherein the detecting a road slope comprises;
receiving input of road images from a camera;
extracting a plurality of lane markers from the converted road images;
performing bird'"'"'s-eye view conversion of the images in which lane markers have been extracted;
calculating a slope in the extracted lane markers; and
calculating a slope in the road using a difference in value between the slopes.
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Specification