k-d树是一种分割k维数据空间的数据结构。主要应用于多维空间关键数据的搜索-kd tree is a k-dimensional data structure segmentation data space. Mainly used in multi-dimensional space-critical data search

为点云数据建立，八叉树结构。可用于点云配准、识别、重建。(Building octree structure for point cloud data)