Method for constructing DSM based on building contour line and airborne LiDAR data
LI Qian1,2, XIAO Chunlei1, CHEN Jie1,2, YANG Dachang1
1. China Aero Geophysical Survey and Remote Sensing Center for Land and Resources, Beijing 100083, China; 2. China University of Geosciences(Beijing), Beijing 100083, China
Abstract：In order to obtain high accuracy DSM data, the authors put forward the method for construction of DSM by using irregular ground points and contour vector line of buildings. First, the point clouds are separated into ground points and non-ground points through adaptive TIN filter method. Second, the building points are separated from the non-ground points according to the height texture. Then, the edges of buildings are extracted by Canny operator based on the depth images of the building which have been gray-quantized; afterwards, the azimuth clustering Comparative Law is used to regulate the building edge. Finally, the DSM could be built by using irregular ground data and contour vector line of buildings. An experiment was performed with a group of LiDAR data obtained in Liuzhou. The results show that the information of buildings’ edges can be more accurate in the DSM constructed by the proposed method in this paper.
李迁, 肖春蕾, 陈洁, 杨达昌. 基于机载LiDAR点云和建筑物轮廓线构建DSM的方法[J]. 国土资源遥感, 2013, 25(2): 95-100.
LI Qian, XIAO Chunlei, CHEN Jie, YANG Dachang. Method for constructing DSM based on building contour line and airborne LiDAR data. REMOTE SENSING FOR LAND & RESOURCES, 2013, 25(2): 95-100.
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2013, Vol. 25 
