普通三维激光扫描仪成果的绝对定位方法

Absolute Positioning Method of 3D Laser Scanner

为实现把三维激光扫描点云成果由局部坐标系定位到大地坐标系中,通过采用4对球形标靶的球心作为虚拟同名点,用人工和自动化结合的工作方法,使用CloudCompare软件进行二次开发、编程,实现了拟合计算标靶球球心坐标和半径,也实现了点云拼接和点云定位。此方法在保证点云配准和定位速度的前提下,进一步提高了点云配准和绝对定位精度,具有一定的应用价值。

To locate the point cloud results of 3D laser scanning from local coordinate system to geodetic coordinate system,the spherical centers of four pairs of spherical targets were used as virtual homonymous points. With the combination of manual and automation methods, CloudCompare software was used for secondary development and programming, which realized the fitting calculation of the spherical center coordinates and radius of the target ball, as well as point cloud registration and point cloud positioning.This method further improves the accuracy of point cloud registration and absolute positioning, and has certain application value.