基于投影点密度的车载激光扫描距离图像分割方法.PDF

34 2 Vol. 34, No. 2 2005 5 ACTA GEODAETICA et CARTOGRAPHICA SINICA May, 2005 : 1001- 15 5(2005) 02-00 5-06 :TP3 1;TP751 :A 1 1, 2 2 史文中, 李必军 , 李清泉 ( 1. , ; 2. , 43007 ) A Method for Segmentation of Range Image Captured by Vehicle- borne Laserscanning Based on the Density of Pro ected Points 1 1, 2 2 SHI Wen-zhong , LI Bi-jun , LI Qing-quan ( 1. Advanced Research Centerf or Sp atial Inf ormation Technology, Department of Land surveying and Geo Inf ormatics, The Hong Kong Polytechnic University, Hong Kong, China; 2. Center of SpatialInf ormation andNetwork Communication, Wuhan University, Wuhan 43007 , China) Abstract:The research presented in this paper is focused on segmentation of range image captured by vehicle-borne laser scanning systems. A method, named as Density of Projected Points ( DoPP ) is proposed for the range image segmentation without other auxiliary data and is conducted to demonstrate the feasibility of the proposed solution by two cases. Image seg- mentation is the foundation and crux of object recognization, positioning, feature extraction and modeling. Range image is the discrete array of coordinates, which cannot describe edge feature or topologic relation, it has not be segmented by mature and feasible methods of segmentation up to now. The investigation in this paper opens a research direction to data acquisition and processing of laserscanning. Key words: laser scanning; range image; density of projected points ( DoPP) ; image segmentati