自由曲面三维散乱测量点云无约束配准

任同群; 赵悦含; 龚春忠; 张丽华

doi:10.3788/OPE.20132105.1234

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自由曲面三维散乱测量点云无约束配准

微纳技术与精密机械 | 更新时间：2020-08-12

- 自由曲面三维散乱测量点云无约束配准
- Unconstrained registration of 3-D scattered point clouds for free-form shape measurement
- 光学精密工程 2013年21卷第5期页码：1234-1243
- 作者机构：
  
  1. 大连理工大学精密与特种加工教育部重点实验室,辽宁大连,116021
  2. 微纳米技术及系统辽宁省重点实验室2. 厦门大学机电工程系3. 大连理工大学精密与特种加工教育部重点实验室
- 作者简介：
- 基金信息：
  
  基于图像处理技术分析动态响应信号的大型结构无损检测研究();高铁钢轨应力状态监测方法研究()
- DOI：10.3788/OPE.20132105.1234
  中图分类号： TP394.1;TB92
- 收稿日期：2012-10-26，
  
  修回日期：2013-01-16，
  
  网络出版日期：2013-05-24，
  
  纸质出版日期：2013-05-15
- 稿件说明：
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任同群赵悦含龚春忠张丽华. 自由曲面三维散乱测量点云无约束配准[J]. 光学精密工程, 2013,21(5): 1234-1243

REN Tong-Qun ZHAO Yue-han GONG Chun-zhong ZHANG Li-hua. Unconstrained registration of 3-D scattered point clouds for free-form shape measurement[J]. Editorial Office of Optics and Precision Engineering, 2013,21(5): 1234-1243
任同群赵悦含龚春忠张丽华. 自由曲面三维散乱测量点云无约束配准[J]. 光学精密工程, 2013,21(5): 1234-1243 DOI： 10.3788/OPE.20132105.1234.

REN Tong-Qun ZHAO Yue-han GONG Chun-zhong ZHANG Li-hua. Unconstrained registration of 3-D scattered point clouds for free-form shape measurement[J]. Editorial Office of Optics and Precision Engineering, 2013,21(5): 1234-1243 DOI： 10.3788/OPE.20132105.1234.

摘要

结合局部曲面拟合和广义二分优化搜索，提出了用于大尺寸自由曲面形貌测量中多视三维散乱点云自动配准的算法。首先，对点云微小局部区域进行标准最小二乘曲面拟合，根据拟合残差提取给定点云的全部非平坦区；借助图论中邻接与可达的概念以及非平坦区的空间分布统计特征，进行相邻点云非平坦区的区域聚类计算以及区域匹配，进而自动获得配准位姿初值。然后，计算源点云在目标点云中最靠近点的k邻近，并向k邻近点的局部移动最小二乘拟合曲面做正交投影，以提取对应点。最后，采用广义二分优化搜索进行位姿变换的优化求解。试验结果表明：该方法稳定、可靠，无需人工交互，适用于采样错移情形。在重叠区域内选取150个对应点进行位姿优化时，平均配准缝隙约为0.02 mm，可以满足大尺寸自由曲面形貌测量的多视三维散乱点云配准的要求。

Abstract

In combination of local surface fitting and generalized bisection optimization search

an automatic registration method is proposed for the multi-view 3-D scattered point cloud registration in the shape measurement of a large scale free-form surface. First

the standard least square surface is fitted in a small local area of point clouds. According to the fitting residue

all the non-flat regions for given point clouds are extracted. Based on the definition of adjacency and reachability of graph theory and the statistical characteristics of spatial distribution of non-flat regions

the non-flat regions for pairwise adjacent point clouds are clustered and matched coarsely. Thereby

the initial transformation is obtained. Then

a point in source point cloud is given and the most closed point and its corresponding k neighboring points in destination point cloud are calculated. Furthermore

the Moving Least Squares(MLS) surface fitting is performed for the k neighboring points. The given point and its orthogonal projection point on the MLS surface are selected as the matching points. Finally

the generalized bisection optimization search is employed to optimize the transformation. Experimental results indicate that the proposed registration method is stable

reliable and without human interaction. It is also suitable for the situation of offset sampling. The average registration seam is about 0.02 mm when 150 matching points in overlapping region are used in optimization calculation. The proposed method meets the requirements of multi-view 3-D scattered point cloud registration in the shape measurement of large scale free-form surfaces.

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references

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