APPLICATIONS OF 3D-EDGE DETECTION FOR ALS POINT CLOUD
- 1Institute of Photogrammetry and Remote Sensing, Chinese Academy of Surveying and Mapping, No. 28, Lianhuachixi Road, Haidian District, Beijing 100830, China
- 2National Quality Inspection and Testing Center for Surveying and Mapping Products, No. 28, Lianhuachixi Road, Haidian District, Beijing 100830, China
Keywords: 3D-Edge, Straight Line Segment, Filtering, Airborne Laser Scanning Point Cloud, Random Sample Consensus, Ground Breaklines
Abstract. Edge detection has been one of the major issues in the field of remote sensing and photogrammetry. With the fast development of sensor technology of laser scanning system, dense point clouds have become increasingly common. Precious 3D-edges are able to be detected from these point clouds and a great deal of edge or feature line extraction methods have been proposed. Among these methods, an easy-to-use 3D-edge detection method, AGPN (Analyzing Geometric Properties of Neighborhoods), has been proposed. The AGPN method detects edges based on the analysis of geometric properties of a query point’s neighbourhood. The AGPN method detects two kinds of 3D-edges, including boundary elements and fold edges, and it has many applications. This paper presents three applications of AGPN, i.e., 3D line segment extraction, ground points filtering, and ground breakline extraction. Experiments show that the utilization of AGPN method gives a straightforward solution to these applications.