3-D MEASURING SYSTEMS BASED ON THEODOLITE-CCD CAMERAS

摘要

A 3-D measuring system is proposed which is formed by attaching a CCD camera to the telescope of each of two motorized theodolites. This system ean work in the same way as other motorized theodolite systems but using the mounted CCD cameras as vision devices to search targets automatically. It can also work on the photogrammetric principle with the CCD cameras as imaging devices and the theodolites as precise direct orientation tools. High resolution image coverage can be obtained by capturing serial images while swinging the telescope with the camera attached. A function of automated 3-D tracking while measuring can also be incorporated in the system. In this paper, the techniques for system calibration and orientation are described and the accuracy capacity of the system investigated experimentally.