机载多回波LiDAR数据的分析与应用  

Analysis and Application of Multiple Echoes Laser Scanner Data

作　　者：杨兴跃[1,2] 杨怀义[3] 张纪成 

机构地区：[1]南阳市城乡规划测绘院,河南南阳473000 [2]桂林理工大学测绘地理信息学院,广西桂林541004 [3]中国建筑材料工业地质勘查中心山西总队,山西太原030000

出　　处：《城市勘测》2016年第4期68-71,78,共5页Urban Geotechnical Investigation & Surveying

基　　金：广西空间信息与测绘重点实验室资助课题(桂科能130511407)

摘　　要：通过分析机载多回波LiDAR数据,对每类回波的特性进行了探讨和研究,并对各个回波信息所表示的地物信息做了详尽的阐述。根据不同回波数据记录的地物不同的原理,提出了针对LiDAR数据自身的分类方案,将数据分为首次回波、中间回波和尾次回波三种类型,最终利用多回波特性减少参与滤波的激光脚点数量。通过实验证明,作者提出的滤波方案,可以预先剔除掉大部分的植被激光脚点和部分的建筑物激光脚点,这既减少了参与滤波的数据量,又可以改善滤波算法对建筑物和植被的滤除效果,大大提高了数据处理的效率和质量。This paper makes an analysis ol airborne LiDAR data which has multiple echoes. The characteristics ol each echo is discussed and studied,and then it expounds the inlormation that each echo represented. According to the principle that different object is recorded by dillerent echo,the writer put lorward a program to classily the LiDAR data, the data is divided into the lirst echoes,middle and tail-echo. Further more,the number ol the points which takes part in the process ol liltering can be reduced. The experiment explains that it can eliminate most ol the vegetation points. There- lore the algorithm can reduce the number ol the points which takes part in the process ol liltering,and improves the ellect ol liltering algorithm lor eliminating the buildings and vegetation . The result indicates that the data processing become more elliciently.

关 键 词：LIDAR 多回波数据 分类 滤波 

分 类 号：P237[天文地球—摄影测量与遥感]