PROCESS FOR THE AUTOMATIC CALCULATION OF THE COEFFICIENT OF A SLOPE ABOUT TO BE ASCENDED BY A MOTOR VEHICLE AND AN ASSOCIATED DEVICE
First Claim
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1. A process for the automatic calculation of the coefficient of a slope about to be ascended by a motor vehicle fitted with a camera capable of capturing at least one image of a road scene extending in front of said motor vehicle, the process comprising the different steps comprising:
- detecting, on an image captured by the camera, a first reference mark, belonging to a reference mark type considered having a generally elongated shape and being repeated along the road, said first reference mark being present at a first position and comprising at least one first element and a second element situated on both sides of the road and in the vicinity of the motor vehicle;
detecting, at a distance from the motor vehicle, of a second reference mark of the reference mark type considered, said second reference mark being present at a second position on both sides of the road;
determining, through the use of an image processing system, a change of direction between the direction of the first reference mark and the direction of the second reference mark;
where applicable, deducing from said change of direction the presence of a slope and calculating the coefficient of said slope, by using the characteristics of said change of direction.
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Abstract
The present invention relates to a process for the automatic determination of the coefficient of a slope from a motor vehicle fitted with a camera.
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Citations
19 Claims
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1. A process for the automatic calculation of the coefficient of a slope about to be ascended by a motor vehicle fitted with a camera capable of capturing at least one image of a road scene extending in front of said motor vehicle, the process comprising the different steps comprising:
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detecting, on an image captured by the camera, a first reference mark, belonging to a reference mark type considered having a generally elongated shape and being repeated along the road, said first reference mark being present at a first position and comprising at least one first element and a second element situated on both sides of the road and in the vicinity of the motor vehicle; detecting, at a distance from the motor vehicle, of a second reference mark of the reference mark type considered, said second reference mark being present at a second position on both sides of the road; determining, through the use of an image processing system, a change of direction between the direction of the first reference mark and the direction of the second reference mark; where applicable, deducing from said change of direction the presence of a slope and calculating the coefficient of said slope, by using the characteristics of said change of direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A driving assistance device installed on a vehicle comprising:
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a camera mounted on the vehicle; a device mounted on the vehicle and coupled to the camera; said device receiving an image captured by the camera and calculating a first reference mark in the image at a first position and a second reference mark in the image at a second position and calculating a coefficient of a slope between said second position and a particular point on the road on which the vehicle is travelling; a headlight control for adjusting a direction of a headlamp beam in response to the calculated coefficient. - View Dependent Claims (18, 19)
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Specification