Research on Algorithms for Calibration of Laser Scanning Projection System

The calibration process of laser scanning projection system requires accurate positioning of cooperative targets and precise calculation of coordinate transformation equations. Therefore, this study analyzed the main causes of projection distortion in laser scanning projectors based on a dual-axis galvanometer, established a corresponding mathematical model, optimized the coordinate transformation equation used for calibration, and studied the use of an adaptive weight particle swarm optimization algorithm for its calculation. Meanwhile, the study also explored the Otsu-optimized Canny operator and combined it with the Delaunay triangulation algorithm to process the scanning detection data of cooperative targets and quickly extract their center coordinates. The comprehensive application of these algorithms was experimentally validated using actual measurement data, and the results indicated that the deviation of the calculated calibration parameters was $1.631 \times 10^{-4} \mathrm{~mm}$.