Accurate installation method and precision analysis for vision measurement of remote falling point

In order to measure precisely the position of remote falling point in large-range using stereo vision measurement technology, a fast accurate installation method with calibration objects for the field vision measurement system was proposed. The first thing of this method was to calculate accurately parameters of system based on measurement conditions. Then, some special calibration objects were emplaced with the same height along the theoretical main axis of camera. According to the images of calibration objects, the pose of camera was adjusted carefully to complete the fast accurate installation of camera. Simulation and experimental results show that this method is very suitable for locating the remote falling point in large-scale field. And the measurement accuracy of this method is about 0.3%.