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Lane line automatic extraction method based on vehicle trajectory

A vehicle trajectory and automatic extraction technology, applied in the field of image processing, can solve the problems of lane line error, low lane line recognition accuracy, and inability to extract lane lines, and achieve high efficiency.

Active Publication Date: 2016-04-13
BEIHANG UNIV
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Problems solved by technology

[0003] At present, the video-based lane line extraction method is to complete the lane line extraction by recognizing road markings. This type of method has several shortcomings: 1) it is impossible to extract lane lines for road sections where road markings do not exist or are blurred; 2) due to the The angle of view problem caused the extracted lane lines to have a large error at the far end; 3) For areas without surveillance cameras, lane line extraction cannot be achieved
Another lane line recognition method is based on GPS positioning data. Its principle is to carry GPS positioning equipment to cruise along the center of the road, and then extract lane lines based on GPS data. The disadvantage of this method is that the positioning error of GPS data is relatively large, so the lane Line recognition accuracy is low

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  • Lane line automatic extraction method based on vehicle trajectory
  • Lane line automatic extraction method based on vehicle trajectory
  • Lane line automatic extraction method based on vehicle trajectory

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Embodiment Construction

[0028] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0029] The invention provides a method for extracting lane lines based on vehicle trajectories, and the used vehicle trajectories are extracted based on aerial video. The present invention is a lane line extraction method based on vehicle trajectories. Firstly, the vehicle trajectories are extracted based on the low-altitude aerial video of the UAV, and then the vehicle trajectory images are constructed based on the vehicle trajectories; Track adhesion between lanes; based on the length characteristics of the track area, filter the non-vehicle track area; then calculate the minimum circumscribed rectangle of each lane track, the center line of the minimum circumscribed rectangle is the center line of the lane, that is, the lane line extraction is realized. The above-mentioned lane line extraction method based on vehicle trajectory, the process is as f...

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Abstract

The invention discloses a lane line automatic extraction method based on a vehicle trajectory. The method comprises the following steps: step 1, extracting the vehicle trajectory; step 2, creating a vehicle trajectory image; step 3, eliminating trajectory adhesion between different lanes based on morphological close operation and erosion; and step 4, extracting a lane line by a minimum enclosing rectangle method. The lane line automatic extraction method based on the vehicle trajectory provided by the invention does not depend on a road marking, therefore, the lane line automatic extraction method is also applicable to road areas without markings or the markings are fuzzy; the invention can extract the lane lines of multiple lanes simultaneously and the efficiency is high; besides, an unmanned aerial vehicle has an advantage of being mobile, therefore, the unmanned aerial vehicle can be used for performing lane line extraction on road sections without traffic monitoring equipment.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to a method for automatically extracting lane lines based on vehicle trajectories. The purpose of the invention is to introduce a generally applicable lane line extraction method for the lane line extraction problem when road markings do not exist or are blurred Both apply. Background technique [0002] Lane lines are an important component of constructing road conditions, and lane line extraction is an important function for automated traffic monitoring systems. Lane line extraction is an important and necessary method for traffic research, such as driving behavior detection, classification (lane change, lane departure, etc.) and single-lane level road network extraction. [0003] At present, the video-based lane line extraction method is to complete the lane line extraction by recognizing road markings. This type of method has several shortcomings: 1) it is impossible to e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V20/588
Inventor 王云鹏徐永正余贵珍吴新开李欣旭
Owner BEIHANG UNIV
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