Car-following trajectory dynamic acquisition method and system

Abstract

The invention discloses a car-following trajectory dynamic acquisition method and system. The trajectory of a front car is obtained by collecting the trajectory of a rear car and the distance between the front and rear cars, wherein the distance between the front and rear cars is calculated based on images shot by a binocular camera mounted on the top of the rear car. The method mainly comprises the following steps: carrying out distortion correction and stereo correction on original images shot by the binocular camera; selecting a target area in one image, and realizing automatic matching of targets in two images based on a template matching algorithm; carrying out calculation according to the triangulation principle to obtain the distance between the actual target area and the binocular camera; keeping the original images shot by the binocular camera, shooting time and the distance corresponding to the target front car; and when carrying out target distance acquisition at the next moment, automatically tracking the target area in the image in the next moment through a target automatic tracking algorithm. The car-following trajectory dynamic acquisition method and system are low in equipment cost, high in data acquisition precision, high in applicability, rich in data content and simple in operation and have a good application prospect in the traffic data acquisition field.

Description

technical field [0001] The invention relates to the field of vehicle flow data collection, in particular to a method and system for dynamic collection of car-following tracks of vehicles based on the principle of binocular distance measurement. Background technique [0002] The research on traffic flow theory requires a large amount of accurate traffic flow data as the analysis object to provide guidance for vehicle control optimization and traffic management optimization. However, under real traffic conditions, it is difficult to collect inter-vehicle distance data accurately and in large quantities. Existing vehicle-following trajectory collection methods mainly include global positioning system (GPS) ranging, aerial photography trajectory extraction, etc. There are certain defects in the existing technology: [0003] Acquisition method of car-following track based on GPS: This method is to fix two GPS receivers on the roof of the leading car and the car-following car re...

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: The present invention aims at the technical problems of the existing vehicle-following trajectory collection method, such as small sample size, low accuracy, weak adaptability, and high collection cost, and provides a device with simple structure, convenient operation, wide application range, and sufficient sample size , method and system for dynamic acquisition of car-following trajectory with high precision

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