Accuracy evaluation method and experiments for photogrammetry based on 3D reference field

摘要

Photogrammetry is a task-oriented and multi-stage measurement metrology and its accuracy is affected by many factors, which is the most important and difficult point in this field. A new accuracy evaluation method for photogrammetry system based on 3D reference field is proposed in this paper, and the effect of optical axes angles and base lines is studied. The 3D reference technology for this accuracy evaluation method which can provide the conversion between laser tracking system and photogrammetry is designed and built. The stability experiments of the reference field are carried out and the results show that the repeatability of point measurement reaches 1 µm and satisfies the requirement. According to the accuracy evaluation method and experiments based on the 3D reference field, the relationships between the system error and optical axes angles, base lines are established, which will guide the design and implementation of measurement schemes.