摘要
利用地面激光扫描仪具有的数据获取速度快、精度高、实时性强、能全天候工作等优点,在快速获取三维点云的基础上,通过点云自动拼接、Hausdorff距离检测不同时期建筑物的三维模型变化,并改进了检测算法,提高了算法的执行效率。通过拟合平面构建Delaunay三角网求解变化区域的面积来评估灾害对建筑物的破坏程度,从而为灾害应急响应以及保险理赔等提供了可靠的决策依据。
Change detection has been widely applied in various fields.The fast and effective monitoring of change is involved in disaster dynamic monitoring,pollution monitoring and urban planning,etc.Terrestrial laser scanning is employed to detect the change of building models,taking the advantage of high speed,good precision,real-time,able to work around the clock,etc.The method consists of three steps： automatic point cloud registration;building change detection using optimized hausdorff distance algorithm from different model laser scan epochs;by plane fitting and Delaunay triangulation constructing,the change of regions of interest is quantified to assess the extent of the damage of disasters on the building,which provides a reliable basis for decision making in emergency response,insurance claim evaluation,etc.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2011年第11期1284-1289,共6页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目(40801191)
对地观测技术国家测绘局重点实验室经费资助项目(2009-11)
国家教育部留学回国人员科研启动基金资助项目
中央高校基本科研业务费专项资金资助项目(2010ZY22)
