LANE DEPARTURE WARNING SYSTEM AND LANE DEPARTURE WARNING METHOD
First Claim
1. A lane departure warning system comprising:
- an image photographing unit attached to a front of a vehicle to photograph an object in a forward direction of the vehicle;
a driving unit receiving image data from the image photographing unit, filtering the image data to search for a lane pair, converting an image coordinate of the image data into a real coordinate to calculate a lateral distance between the lane pair and the vehicle and to calculate a lateral speed of the vehicle, and generating a warning generating signal as a time of lane change elapses by obtaining the time of lane change; and
a warning unit receiving the warning generating signal to generate a lane departure warning signal.
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Accused Products
Abstract
Disclosed is a lane departure warning system. The lane departure warning system includes an image photographing unit attached to a front of a vehicle to photograph an object in a forward direction of the vehicle; a driving unit receiving image data from the image photographing unit, filtering the image data to search for a lane pair, converting an image coordinate of the image data into a real coordinate to calculate a lateral distance between the lane pair and the vehicle and to calculate a lateral speed of the vehicle, and generating a warning generating signal as a time of lane change elapses by obtaining the time of lane change; and a warning unit receiving the warning generating signal to generate a lane departure warning signal. The time of lane change can be acquired by calculating the lateral distance between the vehicle and the lane after converting the image coordinate into the real coordinate, so that the failure can be reduced, thereby improving reliability. In addition, the calculation can be performed depending on a state of the lane so that the failure can be reduced.
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Citations
20 Claims
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1. A lane departure warning system comprising:
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an image photographing unit attached to a front of a vehicle to photograph an object in a forward direction of the vehicle; a driving unit receiving image data from the image photographing unit, filtering the image data to search for a lane pair, converting an image coordinate of the image data into a real coordinate to calculate a lateral distance between the lane pair and the vehicle and to calculate a lateral speed of the vehicle, and generating a warning generating signal as a time of lane change elapses by obtaining the time of lane change; and a warning unit receiving the warning generating signal to generate a lane departure warning signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A lane departure warning method comprising:
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generating image data by photographing an object in a forward direction of a vehicle; filtering the image data to extract candidate lane regions, and grouping the candidate lane regions based on features of the extracted candidate lane regions; searching for a lane pair from the grouped candidate lane regions; and obtaining a time of lane change by converting the image coordinate into a real coordinate; and generating a warning generating signal as the time of lane change elapses. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification