用多种策略从机载Lidar数据中提取建筑脚点

详细信息

Picking up Footprints of Building from Airborne Lidar Data with Multi-strategies

¹Xi'an Research Institute of Surveying and Mapping,1 Middle Yanta Road,Xi'an 710054,China;²College of Surveying and Mapping,Information Engineering University,66 Middle Longhai Road,Zhengzhou 450052,China

摘要: 设计了一种采用多种策略的建筑脚点提取方法,针对建筑脚点提取中的两个关键步骤———数据分类和建筑脚点分割,分别提出和引入了邻近关系和r半径点密度,从仅反映单次反射的DSM数据中,直接提取出建筑表面点。
- 机载Lidar /
- 建筑脚点分割 /
- 邻近关系 /
- r半径点密度
Abstract: The pro and con of all classic algorithms for picking up building footprints are analyzed.And then an arithmetic with multi-strategies is put forward to pick up the building footprints from airborne Lidar data.A workflow of this arithmetic is given.Aiming at the deficiencies in settling out data classification,a new measure named neighbor relation is put forward and as a result,points on vegetation surface are effectively separated and eliminated from points on building surface.Aiming at the deficiencies in settling out data classification,r-radius point density is introduced and as a result,the way to choose seed points are improved better and the perform efficiency in segmentation is advanced.
- airborne Lidar /
- segmentation of building footprint /
- nearby relation /
- r-radius point density