卢昊, 庞勇, 徐光彩, 李增元. 机载激光雷达全波形数据与系统点云差异的定量分析[J]. 武汉大学学报 ( 信息科学版), 2015, 40(5): 588-593. DOI: 10.13203/j.whugis20130443
引用本文: 卢昊, 庞勇, 徐光彩, 李增元. 机载激光雷达全波形数据与系统点云差异的定量分析[J]. 武汉大学学报 ( 信息科学版), 2015, 40(5): 588-593. DOI: 10.13203/j.whugis20130443
LU Hao, PANG Yong, XU Guangcai, LI Zengyuan. Quantitative Analysis of Differences Between Full Waveform Data and System Point Cloud Data from Airborne LiDAR[J]. Geomatics and Information Science of Wuhan University, 2015, 40(5): 588-593. DOI: 10.13203/j.whugis20130443
Citation: LU Hao, PANG Yong, XU Guangcai, LI Zengyuan. Quantitative Analysis of Differences Between Full Waveform Data and System Point Cloud Data from Airborne LiDAR[J]. Geomatics and Information Science of Wuhan University, 2015, 40(5): 588-593. DOI: 10.13203/j.whugis20130443

机载激光雷达全波形数据与系统点云差异的定量分析

Quantitative Analysis of Differences Between Full Waveform Data and System Point Cloud Data from Airborne LiDAR

  • 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。LeicaALS60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。

     

    Abstract: 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 LiDARsystems.Leica ALS60airborne LiDAR system can record both of discrete return data and waveformdata 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 typicalforest and urban areas are picked to perform a digitized assessment of the capability of waveform.Theresults 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 pulseis 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 thanoriginal LiDAR with only point clouds.

     

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