The invention discloses a real-time vehicle speed measuring system and method based on a vehicle side image. The method comprises the steps that 1, a camera obtains the vehicle side image in real time; step 2, placing a calibration plate on a lane in front of the camera for calibration to obtain a perspective transformation matrix; step 3, obtaining the pixel displacement of the vehicle between two frames by using a phase correlation method and an optical flow method for the vehicle side image in the step 1; 4, using a YOLOv8 model to identify the tire position in the vehicle image for the vehicle side image in the step 1; and 5, according to the pixel displacement in the step 3 and the tire position in the step 4, obtaining the actual moving distance between the two frames of the vehicle by using a perspective transformation matrix, and obtaining the real-time speed of the vehicle. By detecting the inter-frame displacement of the vehicle side image when the vehicle passes, the real-time speed of the vehicle can be obtained, and the device is low in cost and easy to install and maintain.

    本发明公开了一种基于车侧图像的实时车速测量系统和方法,包括步骤1,摄像头实时获取车侧图像;步骤2,在摄像头正前方的车道上放置标定板进行标定,获取透视变换矩阵;步骤3,对步骤1中的车侧图像使用相位相关法和光流法获取两帧之间车辆的像素位移;步骤4,对步骤1中的车侧图像使用YOLOv8模型识别车辆图像中的轮胎位置;步骤5,依据步骤3中的像素位移和步骤4中的轮胎位置,使用透视变换矩阵获取车辆两帧之间的实际移动距离,得到车辆实时速度。通过对车辆经过时车侧图像的帧间位移检测,可以获取车辆的实时速度,设备成本低廉,易于安装维护。


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    Title :

    Real-time vehicle speed measuring system and method based on vehicle side image


    Additional title:

    一种基于车侧图像的实时车速测量系统和方法


    Contributors:
    LIU XIAOYONG (author) / XU MUBIN (author)

    Publication date :

    2024-07-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G06T Bilddatenverarbeitung oder Bilddatenerzeugung allgemein , IMAGE DATA PROCESSING OR GENERATION, IN GENERAL / G01P MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK , Messen der Linear- oder Winkelgeschwindigkeit, der Beschleunigung, der Verzögerung oder des Stoßes / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS



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