基于激光点云的平面标靶中心坐标提取方法研究

Research on algorithm for extraction of target center coordinates based on the point clouds

平面标靶在三维激光扫描仪坐标系转换、点云拼接等过程中具有十分重要的作用,通过提取的标靶中心坐标可以衡量测量的精度。在分析目前平面标靶中心坐标提取算法的基础上,探讨了重心类及几何类标靶中心坐标提取算法的实用性。在对初始数据进行预处理后,使用重心类、几何类方法获得了平面标靶中心坐标,并分别对其精度进行了分析和比较。结果表明,重心类方法具有更好的实用性,而几何类方法目前尚无法满足相关工程精度要求。

Planar target plays a very important role in the process of 3D laser scanner coordinate system conversion and point cloud registration, and the accuracy of measurement can be estimated by extracting the coordinates of the center of the target. Based on the analysis of the current point cloud data extraction algorithm, the practicability of the geometric center method and the mass center method is explored. After the original data is pre-treated, the center coordinates of planar target is obtained by the mass center method and the geometric center method, and their accuracy are analyzed and compared respectively. The results show that the mass center method is more practical and the geometry center method is unable to meet the relevant requirements of engineering accuracy.