一种夜间采集交通信息的新方法

本文提出了一种采集夜间交通信息的新方法,即夜间对路段上的车辆进行拍照,对曝光时间内车灯留下的光柱进行分析而获取交通信息。通过3Dmax建立虚拟相机和三维虚拟空间,可以重构出实际拍摄所得的光柱的三维模型,由此我们可以获得车辆行驶的轨迹线。同时,本文从摄影测量的角度提出了解算车辆运动轨迹的另一种思路。此外,本文在该方法用于其他交通信息的提取,例如空间平均速度的计算,以及路段速度-密度曲线的获得等,做了一定的尝试。实践表明,该方法能够快捷、廉价地获得可信的交通信息。

A Simple Method to Collect Traffic Information at Night

This paper proposes a new approach to collect traffic information at night. Photographing the running vehicles at night, the running speed and other information will be explored by analyzing the beam of the traffic lights in the pictures. A virtual camera is found in 3Dmax, forming the simulated photographic space, the beam of traffic lights shows the vehicle trajectory. This paper proposes another approach to estimate the vehicle trajectory based on photogrammetry. The space mean speed and speed-density relation can be gotten to some extent. Some experiments show its advantages.