车载移动测量系统点云精度评定方法

Point clouds accuracy assessment method of mobile mapping system for land vehicle

为了对车载移动测量系统点云精度进行客观准确的评价,该文提出了利用室外三维检测场,借助自制的反射纸、球形靶标和特征地物,获取特征点的高精度三维坐标和特征线的长度值,通过与系统解算出来的结果进行比对,评价了系统的绝对精度、相对精度和重复性精度。试验结果表明,该文提出的方法可以对厘米级车载移动测量系统进行点云精度评定,方法切实可行,为相关检测标准的制定提供技术支持。

In order to objectively and accurately evaluate the point cloud accuracy of mobile mapping system for land vehicle(VMMS),three methods were proposed in this paper,with the self-made reflective paper,spherical target and features in the three-dimensional testing field,to obtain the high precision three dimensional coordinates of the feature points and the feature lines length by using traditional method.Then the absolute accuracy,relative accuracy,and repeatability of the system were evaluated by comparing the results calculated with the system.The results showed that our methods could evaluate the accuracy of the centimeter-class VMMS.The methods are feasible,and provide technical support for implementing relevant detection standards.It has certain practical significance and reference value.