目标颜色和入射角对Trimble GX扫描点云精度的影响

介绍三维激光扫描仪的误差分类及近年来国外在目标反射特性对点云精度影响方面的研究进展,大量实验表明点云精度与目标表面反射特性存在较强关系。通过对纸质贴片点云分析得出如下结论:Trimble GX三维激光扫描仪所测点云标准偏差与反射激光亮度符合乘幂函数关系;目标颜色对该扫描仪测量精度有较大影响,白、绿、黄、蓝等颜色对绿色激光反射率较好;纸质贴片旋转一个较小角度可使扫描点云质量最优;纸质贴片反射特性服从朗伯余弦定律。

The effects of known color and incidence angle on the accuracy of Trimble GX 3D scanning point cloud

.The error facts of 3D laser scanner and the recent research of the effects of reflective properties on the point cloud accuracy are reviewed, and many experiments show that there is a certain relationship be- tween the point cloud accuracy and the reflective properties of target surface. The following conclusions are provided through analyzing the point cloud of the patches, there is a power function between the plane fitting error of the Trimble GX 3D laser scanner point cloud and the reflected laser intensity~ color has a great impact on the scanner accuracy, white, green, yellow and blue have a better reflectivity at green la- ser~ scanning patches at an small angle produces the optimal point cloud, and patches reflection character- istics complies with the Lambert cosine law.