Collecting method for road traffic parameters based on video technique

A road traffic and parameter acquisition technology, applied in the field of traffic flow detection, can solve the problems of poor environmental adaptability and low detection accuracy, and achieve the effects of less calculation, high detection accuracy and environmental stability

Inactive Publication Date: 2012-09-19
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the shortcomings of low detection accuracy and poor environmental adaptability in the above-mentioned prior art, and provides a method for detecting road traffic parameters based on video technology, wherein the parameters include flow rate, time average speed, time occupancy rate, and average vehicle head time. Equal distance

Method used

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  • Collecting method for road traffic parameters based on video technique
  • Collecting method for road traffic parameters based on video technique
  • Collecting method for road traffic parameters based on video technique

Examples

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Embodiment 1

[0108] Traffic parameters are collected on a two-way 4-lane road. The camera is fixed on the gantry. The collected images are as follows: Figure 5 , Image 6 shown. There are 4 lanes from left to right in the picture, each lane is set with two detection areas, the distance between the two detection areas is 1.85 meters, each detection area includes 10 basic blocks, and the relative brightness level includes 2 levels, Five of the basic tiles are black tiles and the other five are white tiles.

[0109] The image processing process is as follows:

[0110] Acquire and process images at a rate of 25 frames per second. For each frame of image, perform the following calculations:

[0111] Step 1, use the 5×5 smoothing filter method to remove the small components in each basic block. For the pixel I[r,c] (r,c represent the row and column coordinates respectively), the filtering result is:

[0112] F ( r , c ...

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Abstract

The invention provides a collecting method for road traffic parameters based on a video technique, in order to overcome the defects of the prior art of low detection accuracy and poor environmental adaptation. The parameters contain flow, time average speed, time occupancy, average time headway, and the like. A pattern drawn in a detection area has better relative brightness combined mode consistency under different light environments, so that the methods of background difference, inter-frame difference, and the like, need not to be adopted when the road traffic parameters are collected. Meanwhile, the operand is less and the detection precision and environmental stability are higher.

Description

technical field [0001] The invention relates to the technical field of traffic flow detection, in particular to a method for collecting road traffic parameters based on video technology. Background technique [0002] Intelligent Transportation System (ITS) is recognized as a powerful means to solve modern traffic problems, and traffic information collection is the technical basis for the smooth implementation of ITS. Existing traffic flow detection technologies mainly include: ultrasonic, ground sense coil, geomagnetic, pressure, infrared, video, etc. Compared with other detection technologies, the significant advantage of video technology is that it has a wealth of information, so it is possible to obtain fine-grained traffic information. In addition, video technology is more intuitive and can comprehensively record and reproduce road traffic scenes. Therefore, Many large and medium-sized cities have built large-scale video surveillance networks. Most of the existing vide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G08G1/052
Inventor 林培群
Owner SOUTH CHINA UNIV OF TECH
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