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Image-based traffic state detection method

A technology of traffic status and detection method, applied in the field of traffic detection, can solve problems such as low data utilization rate

Active Publication Date: 2022-05-10
北京科技大学天津学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides an image-based traffic state detection method, which is used to solve the problem that many traffic management departments at home and abroad have installed traffic cameras on main highway sections and important urban intersections, and the utilization rate of collected data is low. situation where there is not yet a technical solution to take full advantage of these new sources of data

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] An image-based traffic state detection method, comprising:

[0095] Obtain traffic monitoring video, divide it according to the resolution, and determine the video clips that reach the preset resolution;

[0096] Determining the section area to be detected through grayscale impact detection and image binarization of the video clip;

[0097] Segmenting the video clips through multi-scale images to determine vehicle features, and constructing a three-dimensional model of the vehicle to determine the vehicle bottom area;

[0098] The perspective projection of the monitoring video is converted to an orthographic projection through projection transformation (generally, the surveillance video is located in front of the road side, and the shooting image has geometric deformation. Projection transformation is to transform the image into a vertical upper shooting effect, eliminating the estimation error caused by the deformation of the road and vehicles ), and determine the tra...

Embodiment 2

[0113] Preferably, the method also includes:

[0114] Docking with the data source of traffic surveillance video; among them,

[0115] The data sources include: road monitoring system, private road test monitoring equipment and traffic monitoring satellite;

[0116] Obtain traffic monitoring videos from different channels through the data source; wherein,

[0117] The traffic monitoring video includes: tunnel video, road video, bridge video;

[0118] Carry out traffic monitoring videos from different channels.

[0119] The principle of the above-mentioned technical scheme is: the data collection of the present invention utilizes traffic monitoring video and images as data sources, as attached figure 2 shown, but with figure 2 The collected images are original traffic images with relatively low resolution. The distance in the image cannot be detected, so it is necessary to intercept the image to determine the area of ​​the detected road section. The intercepted image is ...

Embodiment 3

[0122] Preferably, the method also includes:

[0123] According to the traffic monitoring video, determine vehicle information and road pavement standards on the road; wherein,

[0124] The vehicle information includes: vehicle quantity, vehicle location, vehicle type and vehicle volume;

[0125] The road pavement standard includes: road width, road lane type and road division standard;

[0126] The road information is determined according to the vehicle information on the road and road surface standards.

[0127] The principle of the above-mentioned technical solution is: the present invention mainly uses the video of traffic monitoring to calculate the degree of traffic congestion, so the most important thing is that the vehicle information and road standards on the road can be clearly known; through the vehicle information and road standards, To calculate the space occupancy rate of the road and the degree of traffic congestion. The definition of road space occupancy is:...

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Abstract

The invention provides a traffic state detection method based on images. According to the method, the road space occupancy is estimated through image processing, feature extraction, projection transformation and other methods by using traffic images, and the traffic congestion state is judged. Because the traditional video traffic detection technology needs to carry out camera calibration, the precision requirement on the installation and debugging of the camera is very high. According to the method, projection transformation is used for replacing camera calibration, and a traditional method is improved. In addition, the traffic image is fully utilized as a data source. The images can be acquired through monitoring videos, and no additional data acquisition equipment and maintenance cost are needed. As the data are widely distributed, traffic planning and research data can be provided for traffic management departments for urban road sections lacking traffic data acquisition equipment.

Description

technical field [0001] The invention relates to the technical field of traffic detection, in particular to an image-based traffic state detection method. Background technique [0002] At present, the collection of real-time traffic data provides important data for solving traffic safety and congestion, and is also the basis for urban traffic planning and management. With the development of intelligent transportation system, new traffic data acquisition technology and equipment are continuously developed and applied. Among the current numerous traffic collection technologies (inductive coil, microwave radar, infrared detector, GPS, etc.), video-based traffic monitoring and management has been more and more widely used. [0003] Since the 1990s, many traffic management departments at home and abroad have installed traffic cameras on major highway sections and important urban intersections. The traffic video data is transmitted back to the main control center through the opti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G06V20/54G06V20/40G06V10/26G06V10/56G06V10/46
CPCG08G1/0125
Inventor 杨凯欣张素杰杨欣冉陈鹏
Owner 北京科技大学天津学院