Adjustment Model of Boundary Extraction for Urban Complicate Building Based on LiDAR Data

Abstract:

The extraction and regulation of building boundary is a crucial step towards 3D building reconstruction, most methods that are appropriate for buildings of regular polygon cannot extract irregular building boundary which contains arc lines. A structure method for extracting building feature points is put forward by considering the irregular building boundary. By judging the property of feature points, feature points located at rectangular corner are adjusted with the parallel requirements to obtain accurate feature points, boundary points between adjacent arc feature points are fitted to an arc so as to get the real smooth boundary. Building boundary that contains arc lines can be efficiently extracted by proposed method. As a case study, LiDAR point clouds of Lujiazui in Shanghai are used to prove the feasibility and extraction accuracy of the method.