文献类型：期刊文献

中文题名：机载激光雷达全波形数据与系统点云差异的定量分析

英文题名：Quantitative Analysis of Differences Between Full Waveform Data and System Point Cloud Data from Airborne LiDAR

作者：卢昊[1] 庞勇[1] 徐光彩[1] 李增元[1]

第一作者：卢昊

机构：[1]中国林业科学研究院资源信息研究所

年份：2015

卷号：40

期号：5

起止页码：588-593

中文期刊名：武汉大学学报：信息科学版

外文期刊名：Wuhan Daxue Xuebao (Xinxi Kexue Ban)/Geomatics and Information Science of Wuhan University

收录：CSTPCD;;EI(收录号：20152200887492);Scopus(收录号：2-s2.0-84929753406);北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家973计划资助项目(2013CB733404;2013CB733406);国家863计划资助项目(2012AA12A306)~~

语种：中文

中文关键词：全波形;点云;LiDAR;高斯分解;垂直结构;统计决策树;定量化;信息熵

外文关键词：full waveform; point cloud; LiDAR; Gaussian decomposition;vertical structure; statisti-cal decision tree; quantification; information entropy

分类号：P237.3;TP751

摘要：目前常用的小光斑机载LiDAR波形数据与系统点云数据的来源相关性较大,波形数据的优势难以严格定量地评价和比较。Leica ALS60机载LiDAR系统记录的全波形数据与点云数据相对独立,点云数据来自硬件系统脉冲探测方法,而波形数据是未加处理的原始回波序列。本文对原始波形数据进行分解获取发射脉冲的全部回波,与系统探测点云进行了定量对比,并选取典型林区和城区数据,得到波形在两种地物类型中垂直信息获取能力的定量表征参数。结果表明,波形数据对不同地物类型均能丰富垂直结构信息和提高点云垂直分辨率,且这种提高在林区表现优于城区人工建筑和裸地;激光对树木冠层的穿透能力更明显地表现在回波波形信息中,相较于传统点云激光雷达,全波形LiDAR在森林垂直参数获取方面潜力更大。
The superiority of waveform data is hard to evaluated and compared with point clouds quan- titatively due to a high correlation between two data sources from the most commonly used LiDAR systems. Leica ALS60 airborne LiDAR system can record both of discrete return data and waveform data simultaneously and independently. The raw waveforms are decomposed into individual pulse re- turns and compared with the laser points from the hardware system quantitatively. Data from typical forest and urban areas are picked to perform a digitized assessment of the capability of waveform. The results show that waveform data can increase the vertical information in different types of ground ob- jects and spatial resolution of point cloud at a certain level and that the increment in forest area is high- er than that of urban area and bare earth. It is concluded that the penetration capability of laser pulse is more evident in full waveform data than in point cloud from ALS system itself, and that full wave- form LiDAR has much more potential in constructing the vertical parameters in the forest areas than original LiDAR with only point clouds.