基于Tin改进的LiDAR滤波算法

LiDAR Filtering Algorithm Based on the Improved Tin

现有典型的基于Tin的滤波算法只对本格网内的数据进行处理,没有考虑邻近地形的影响,使得滤波处理不能取得很好的效果。本文以待处理格网为中心,将待处理格网最低点与领域格网最低点构成三角网,再对格网内的数据与所在三角形的三个顶点进行比较,判断是否符合阈值来确定是否为地面点。实验的结果表明对改进后的三角网迭代的算法大大改善了滤波效果,提高了滤波处理结果的准确性。

The filtering algorithm based on Tin is just for data within grid, without considering the impact of adjacent terrain. So the result is not very well. In this paper, taking the grid to be processed as the center, it generated the triangulation with the lowest point of the grid to be processed and the one of the adjacent grid, and then compared the data of the grid with the three points of the triangle to identify whether they meet the threshold or not so as to determine whether the lowest point is the ground point. The results show that the algorithm of the improved triangulate iterative enhanced the effect of filtering and height- ened the accuracy of the results.