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Method for detecting and shooting vehicle based on composite virtual coil

A virtual coil and vehicle detection technology, which is applied in traffic flow detection, instruments, calculations, etc., can solve the problems of unable to detect and capture vehicles, and achieve the effect of high capture accuracy and flexible selection

Inactive Publication Date: 2012-01-18
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fixed setting of the virtual coil position, it is impossible to detect and capture vehicles that do not follow the road

Method used

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  • Method for detecting and shooting vehicle based on composite virtual coil
  • Method for detecting and shooting vehicle based on composite virtual coil
  • Method for detecting and shooting vehicle based on composite virtual coil

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] Step 1. Background image reconstruction

[0038] The traffic video sequence diagram is dominated by the road surface area, and the gray levels of the road surface area are similar and have little change. Therefore, the background image can be reconstructed using the statistical features based on the gray level of the road surface. The specific steps are as follows:

[0039] 1. In order to overcome the grayscale fluctuation caused by noise and reduce the amount of calculation, the traffic video sequence diagram is sampled and divided into blocks: according to the order of the video sequence diagram, a frame of image is extracted every certain number of frames from the first frame to obtain the sampling Image SF(x, y), convert the sampled image SF(x, y) into a grayscale image SG(x, y) according to the grayscale conversion formula, and cre...

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Abstract

The invention discloses a method for detecting and shooting a vehicle based on a composite virtual coil. The method comprises the following steps of: (1) carrying out background reconstruction on an image sequence of a traffic video to obtain a background image in a monitored region of a vidicon; (2) generating the composite virtual coil; (3) extracting the region of the vehicle; (4) updating a vehicle driving information list; and (5) storing three images for recording the illegal process of the vehicle according to the position relationship between the region of the vehicle represented by each item in the vehicle driving information list and the virtual coil so that an illegal vehicle is shot. According to the method for detecting and shooting the vehicle based on the composite virtual coil disclosed by the invention, the problems of inflexible time selection and low shooting accuracy of the traditional virtual coil method in the process of shooting can be solved; the disadvantages of incapability of detecting and shooting vehicles pressing lane lines and illegally steering in the traditional virtual coil method can be overcome; and, compared with the traditional virtual coil method, the method disclosed by the invention has the advantages of flexible shooting time selection and high shooting accuracy and is capable of detecting and shooting vehicles driving not according to lanes.

Description

technical field [0001] The invention belongs to the field of intelligent traffic monitoring, and in particular relates to a method for detecting vehicles and capturing illegal vehicles by analyzing traffic video images, which is suitable for application in urban roads and highway scenes. Background technique [0002] Vehicle detection and vehicle violation capture are the key and basic parts of the Intelligent Transportation System (ITS), which are related to the accuracy of traffic flow statistics, vehicle speed measurement and license plate recognition, and play an important role in analyzing traffic conditions, improving traffic order, and ensuring traffic safety. effect. The traditional vehicle detection and capture method is mainly the physical induction coil method, that is, the induction coil with alternating current is buried under the road surface. When the vehicle passes or stops above the coil, it can be detected by detecting the change of the induced current in t...

Claims

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Application Information

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IPC IPC(8): G08G1/01G06K9/00
Inventor 汪国有陈琳何静田江敏朱曼瑜
Owner HUAZHONG UNIV OF SCI & TECH
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