国土资源遥感Issue(2)：54-59,6.DOI:10.6046/gtzyyg.2014.02.10
LiDAR点云与影像相结合的建筑物轮廓信息提取
The extraction of building boundaries based on LiDAR point cloud data and imageries
摘要
Abstract
A method for extracting building boundaries using airborne LiDAR point cloud data and imageries is proposed in this paper. Firstly, an α-shape algorithm is used to extract the rough outline of buildings from point clouds. Then building edge line segments are extracted from the registered images by an straight line segments extraction algorithm based on line region support. By using voting mechanism and point-to-line distance, the true boundaries of the buildings are obtained. Finally, a new method for refinement of a building outline is put forward, in which the extracted edge information is utilized to correct the rough outline extracted by the point cloud image, and the revised outline is processed by Douglas - Peucker algorithm to remove redundant nodes. the force intersect method is employed to restore the corner of the building, and finally the accurate outside contour polygons of the building is obtained. The effectiveness of the proposed method has been verified by experiments.关键词
LiDAR/点云/航空影像/建筑物轮廓提取Key words
LiDAR/point clouds/airborne imageries/building boundary extraction分类
天文与地球科学引用本文复制引用
李云帆,龚威平,林俞先,汪波..LiDAR点云与影像相结合的建筑物轮廓信息提取[J].国土资源遥感,2014,(2):54-59,6.基金项目
国家科技支撑计划项目(编号:2013BAJ04B03)资助。 （编号:2013BAJ04B03）
