监控视频中车辆平均速度测算方法比较

The comparison of estimated measures for vehicles' average speed in surveillance video

根据车辆速度计算公式,提出了两种基于监控视频测速的思路。一是视频图像与实地测量相结合,车辆运动距离通过与监控画面匹配后实地测量,运动时间通过视频帧率运算分别获得。二是利用车辆技术参数测量,在视频图像中,车身前后明显部位经过同一点,车辆运动距离和时间分别通过被测车型技术参数、视频帧率运算获得。并通过实验结果对两种方法进行评价。

According to calculation formula of vehicle speed, two methods for measuring the vehicle＇s speed based on the surveillance video were suggested. The first method is based on the combination of video image and field measurement. Matched with the surveillance video image, the vehicles＇ movement distance can be measured on field, and the movement time can be calcu- lated from the video frame rate. The second method uses the measurement of vehicles technical parameters. While the vehicles＇ typical part passes the same point in the video image, the movement distance and time can be obtained from the vehicles＇ technical parameters and video frame rate. Two methods have been evaluated by experiments.