A calibration method for uncoupling projector and camera of a structured light system

This paper is focusing on the calibration of a 3D measurement system based on a structured light technique. Key to the proposed method for calibration of the system is to uncouple the complicated relationship between the projector and camera, and separate the calibration procedure into two parts. The first part is to calibrate the camera. After that, with the help of the parameters of the calibrated camera and the relation between the target feature points of camera calibration and projector calibration, the second part is to calibrate the projector. The proposed calibration method is fast, accurate and easy to implement. It significantly simplifies the calibration procedures of structured light systems. Both analytical and numerical solutions of the system calibration can be obtained. In this paper, the principle of the proposed method is described and some satisfactory experimental results are presented.