光学精密工程2025，Vol.33Issue(1)：37-49,13.DOI:10.37188/OPE.20253301.0037
基于双投射结构光系统的多尺度点云融合
Multi-scale point cloud fusion based on dual-projection structured light system
摘要
Abstract
Addressing the challenge of scale discrepancies between point clouds in dual-projected struc-tured light systems,which hinder their direct fusion,this study presents a novel multi-scale point cloud fu-sion method.First,the dual-projected structured light system is calibrated to determine the intrinsic and extrinsic parameters of the cameras and projectors,along with the relative external parameters of the two systems.The weighted least squares phase expansion method is applied to extract the absolute phase,and point cloud data are computed using the calibrated parameters.Next,the spatial distances between any two points within the overlapping regions of the two systems are calculated to determine the relative scale factors,achieving scale unification between the point clouds.Coarse alignment is then performed using principal component analysis,followed by the derivation of the global optimal transformation matrix using an iterative nearest neighbor algorithm.The source point cloud is subsequently transformed to align with the target point cloud based on the calculated transformation matrix.Finally,the Euclidean distance is em-ployed to evaluate the fused neighboring points,and outlier points are removed using a predefined thresh-old,ensuring accurate multi-scale point cloud fusion.Experimental results demonstrate that the standard deviation of the plane fitting error decreases by approximately 19.56%after fusion,validating the method's effectiveness in fusing point clouds and reconstructing object surfaces at varying scales.In conclusion,this research provides a robust solution for addressing scale-induced errors in dual-projected structured light systems and successfully mitigates missing data caused by occlusion.关键词
结构光系统/三维重建/双投射/点云融合Key words
structured light system/3D reconstruction/dual projection/point cloud fusion分类
计算机与自动化引用本文复制引用
姬小峰,李建军,牛健,邓高旭..基于双投射结构光系统的多尺度点云融合[J].光学精密工程,2025,33(1):37-49,13.基金项目
海安太理工研究院开放研发项目(No.HA-TYUTKFYF025) （No.HA-TYUTKFYF025）
山西省基础研究计划青年科学研究项目(No.202303021222166) （No.202303021222166）
山西省基础研究计划联合资助项目(交控)(No.202303011222008) （交控）
