中国安全科学学报 ›› 2021, Vol. 31 ›› Issue (6): 128-135.doi: 10.16265/j.cnki.issn 1003-3033.2021.06.017

• 安全工程技术 • 上一篇    下一篇

基于行车视频消失点和逆透视变换的车速测量*

关闯1,2, 冯浩**1,2 高级工程师, 张志勇1,2 高级工程师, 姜镇飞1,2, 张泽枫1,2 工程师   

  1. 1 司法鉴定科学研究院 上海市司法鉴定专业技术服务平台,上海 200063;
    2 司法部司法鉴定重点实验室,上海 200063
  • 收稿日期:2021-03-19 修回日期:2021-05-13 出版日期:2021-06-28 发布日期:2021-12-28
  • 通讯作者: **冯浩(1982—),男,吉林四平人,硕士,高级工程师,主要从事于道路交通事故调查与重建方面的工作。E-mail: fengh@ssfjd.cn。
  • 作者简介:关闯 (1994—),男,河南周口人,硕士,助理工程师,主要从事于交通事故重建方面的工作。E-mail: guanc@ssfjd.cn。
  • 基金资助:
    上海市科技创新行动计划项目(20DZ2205200);中央级科研院所公益项目(GY2020Z-1,GY2020G-7)。

Vehicle speed measurement based on vanishing points of driving videos and inverse perspective mapping

GUAN Chuang1,2, FENG Hao1,2, ZHANG Zhiyong1,2, JIANG Zhenfei1,2, ZHANG Zefeng1,2   

  1. 1 Academy of Forensic Science, Shanghai Forensic Service Platform, Shanghai 200063, China;
    2 Key Laboratory of Forensic Science, Ministry of Justice, Shanghai 200063, China
  • Received:2021-03-19 Revised:2021-05-13 Online:2021-06-28 Published:2021-12-28

摘要: 为了克服行车途中相机抖动对车速测量的影响,利用行车视频消失点特性和逆透视变换特征,提出一种通用车速测量方法。首先通过检测车道线来识别获取消失点位置和车道斜率信息;其次建立相机三参数模型,并利用透视成像原理,推导出俯仰角、偏航角以及高度的计算公式;然后对逆透视变换后的正投影图像进行特征运动分析,获取自车及目标车辆速度;最后分别在自车车速为20、25、30、35、40、50 km/h以及前方目标车辆车速为10、20、30 km/h的情况下进行实车试验。结果表明:自车车速的平均误差不超过5%,前车车速的平均误差不超过7%,能够达到交通事故车速测量的要求。

关键词: 行车视频, 消失点, 逆透视变换, 车速测量, 交通事故

Abstract: In order to overcome impact of camera jitter on speed measurement during driving, a general speed measurement method was proposed based on characteristics of driving video's vanishing points and inverse perspective mapping. Firstly, positions of those points and slope information of traffic lanes were obtained by detecting and identifying lane lines. Secondly, a three parameter model of cameras was established, and calculation formulas of pitch angle, yaw angle and height were derived by using perspective imaging principle. Then, velocity of self-driving vehicle and target vehicle were obtained through analyzing feature motion of forward projection image after reverse perspective transformation. Finally, a real vehicle test was carried out under conditions of self-driving speed 20, 25, 30, 35, 40, 50 km/h and front target vehicle at 10, 20, 30 km/h respectively. The results show that the average error of self-driving speed is less than 5%, while that of front vehicle is less than 7%, which can meet requirements of traffic accident speed measurement.

Key words: driving video, vanishing point, inverse perspective mapping, speed measurement, traffic accident

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