Abstract:The reconstruction measurement technology based on monocular structured light is widely used in modern measurement field, especially in the measurement of small and mediumsized lowreflective parts with certain curved surface characteristics, due to its high accuracy and low cost. The measurement error is an important factor affecting measurement accuracy. Firstly, according to the constructed monocular structured light reconstruction measurement system, the main sources of errors affecting measurement accuracy are analyzed, and the quality of the collected structured light pictures is ensured through reasonable setting and adjustment of the parameters of the hardware equipment. Then, in order to improve the sinusoidal property of the projected structured light, a simple method to reduce the nonlinear gamma response of a common projector is proposed. Finally, a Zhang Zhengyou optimization calibration algorithm based on circular calibration plate is proposed to improve the calibration accuracy of the system. The experiment results show that the accuracy of reconstructing the measured point cloud data on the surface of small and mediumsized curved parts is between 03 and 06 mm, and the reconstruction measurement time of a single projection on the surface of the measured object is within 2 minutes, which verifies that the compensation method is effective and feasible. .txt