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Intersection multi-lane calibration method based on perspective transformation

An intersection and perspective transformation technology, applied in the field of intelligent transportation, can solve the problems of high cost, difficult construction, and inconvenient maintenance.

Active Publication Date: 2015-10-21
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current method of embedding induction coils at intersections is not only costly and difficult to construct, but also inconvenient to maintain in some congested road sections

Method used

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  • Intersection multi-lane calibration method based on perspective transformation
  • Intersection multi-lane calibration method based on perspective transformation
  • Intersection multi-lane calibration method based on perspective transformation

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Embodiment Construction

[0059] The specific implementation of the multi-lane marking method at an intersection based on perspective transformation according to the present invention will be described in detail below in conjunction with the embodiments.

[0060] Step 1: Select an image with obvious lane lines from the surveillance video of the intersection to avoid interference such as vehicle occlusion, where the height of the image is height, the width is width, and the unit is pixel. The four selected intersection images are as follows figure 1 shown.

[0061] Step 2: On the basis of the selected image, use the Canny operator to extract the edge, and then use the Hough transform to extract n straight line segments l i (i=1,2,…,n), where l i The coordinates of the start and end points of , respectively denoted as A i (x Ai ,y Ai ) and B i (x Bi ,y Bi ), the coordinate origin is the upper left corner of the image. The slope corresponding to each line segment is k i ,Calculated as follows: ...

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Abstract

Disclosed is an intersection multi-lane calibration method based on perspective transformation. The intersection multi-lane calibration method comprises the following steps that 1, an image with an obvious lane line is selected from a monitor video of an intersection; 2, edge extraction is performed through a Canny operator on the basis of the selected image, and then n straight line segments are extracted by means of Hough transformation; 3, horizontal line segment sets H and vertical line segment sets S are obtained according to slopes; 4, the sets H and S obtained in the step 3 are screened preliminarily; 5, the H and S finally obtained from the step 4 are marked as H' and S', and the line segments are further filtered; 6, a red light line is determined in H'' and S'' is further filtered so as to determine a lane line; 7, the line segment representing the lane line is found out from the set S''' obtained from the step 6.

Description

technical field [0001] The invention relates to the field of intelligent transportation, in particular to a method for analyzing the image of an intersection through perspective transformation to calibrate the position of each lane. Background technique [0002] With the rapid development of my country's transportation industry, the number of cars in cities has increased year by year, and the problem of urban road traffic jams and congestion has become more and more prominent. The construction of a modern traffic control system can greatly improve the utilization rate of existing roads, and reliable violation detection is the guarantee for intelligent traffic applications. [0003] Multi-lane marking at intersections is a key to judging violations. The current method of embedding induction coils at intersections is not only costly and difficult to construct, but also inconvenient to maintain in some crowded road sections. As an alternative computer vision technology, it ha...

Claims

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Application Information

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IPC IPC(8): E01C1/00
Inventor 高飞梅凯城高炎李定谢尔丰敏强胡伟江卢书芳肖刚
Owner ZHEJIANG UNIV OF TECH
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