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Vehicle positioning and speed measuring method based on dynamic video feature of vehicle

A technology of video features and vehicle features, applied in the field of intelligent transportation and close-range photogrammetry, can solve the problems of high false detection rate, poor real-time performance, and high cost of hardware installation and configuration

Inactive Publication Date: 2014-09-03
SHANGHAI JIAO TONG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes a vehicle positioning and vehicle speed measurement method based on vehicle dynamic video features, which can solve the problems of cumbersome equipment calibration, complex measurement algorithm, high false detection rate, low accuracy and real-time Poor performance and high cost of hardware installation and configuration

Method used

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  • Vehicle positioning and speed measuring method based on dynamic video feature of vehicle
  • Vehicle positioning and speed measuring method based on dynamic video feature of vehicle
  • Vehicle positioning and speed measuring method based on dynamic video feature of vehicle

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Embodiment 1

[0036] Such as figure 1 As shown, this embodiment relates to a vehicle positioning and vehicle speed measurement method based on vehicle dynamic video features, including using a calibrated vehicle to obtain vehicle dynamic video feature parameters, using video dynamic features to quickly identify the vehicle to be tested, and restore the dynamic feature model of the vehicle to be tested And the four steps of vehicle position and speed calculation, which are specifically as follows:

[0037] The first step is to obtain the dynamic video feature parameters of the vehicle by using the data of the calibrated vehicle driving process: drive a calibrated vehicle to face the camera lens of the road traffic video surveillance system at a constant speed from far and near, and record the image feature size and size of the vehicle in the video image frame The actual vehicle motion state parameter sequence information, and the relationship between the vehicle dynamic video feature parameters ...

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Abstract

The invention relates to a vehicle positioning and speed measuring method based on the dynamic video feature of a vehicle, belonging to the technical field of intelligent transportation and close-range photogrammetry. The vehicle positioning and speed measuring method comprises the following steps: judging the vehicle dynamic video feature size in a video image within any time quantum in one video monitoring system according to vehicle dynamic feature parameters extracted from the video image which calibrates a vehicle traveling process, and reconstructing and reducing a dynamic video feature model of a to-be-measured vehicle traveling process corresponding to each image frame; and calculating an actual position and a vehicle speed value sequence corresponding to each image frame in the to-be-measured vehicle traveling process according to a mapping relation between the dynamic variation characteristic of the image feature size of a vehicle to be measured and the actual vehicle movement parameters, and thus acquiring the actual position and traveling speed information of the vehicle. The vehicle positioning and speed measuring method is easy to realize and high in accuracy, and is applicable to the demands of various vehicles on speed measurement in a road traffic video monitoring system.

Description

Technical field [0001] The invention relates to a method in the technical field of intelligent traffic and close-range photogrammetry, in particular to a vehicle positioning and vehicle speed measurement method based on the dynamic video characteristics of the vehicle for the existing road traffic video monitoring system. Background technique [0002] In road traffic monitoring and management, vehicle speed measurement is an important foundation for road traffic control such as the analysis of the cause of traffic accidents and the identification of responsibility, road flow monitoring, and regulation intervention, and it plays a vital role in the establishment of intelligent transportation systems. In terms of road traffic, traditional vehicle speed measurement methods mainly include: radar detection, induction coil detection, laser / infrared detection, ultrasonic / microwave detection, etc. Among them, radar detection and induction coil detection methods are more commonly used. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G08G1/052G06T7/20
Inventor 张晓云于蕾
Owner SHANGHAI JIAO TONG UNIV
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