Abstract: In order to track and locate the vehicle target in a long distance, a positioning system based on single camera and laser rangefinder are designed in this paper. The single camera photography, laser rangefinder and angle sensor are equipped for this positioning system. LK optical flow algorithm is used to track the target in real time, the coordinate equation model of camera, rangefinder and target is constructed, so it can track and calculate the position of moving target from 100 meters to 300 meters in real time. The positioning system does not need to install any facilities on the tested moving target, so it can track and locate the cooperative or non-cooperative target. In this paper, a high-precision CORS system is used to verify the accuracy. The accuracy of the system for real-time tracking and positioning of vehicle target is kept at the sub meter level.

Key words: positioning system, long distance object tracking, object positioning, single camera, optical flow algorithm