Tree species classification based on full-waveform airborne laser scanning data
Tree species classification based on full-waveform airborne laser scanning data
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DOI：
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发表时间：
2009
影响因子：
5
通讯作者：
M. Hollaus;W. Mücke;B. Höfle;W. Dorigo;N. Pfeifer;W. Wagner;C. Bauerhansl;B. Regner
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文献类型：
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作者：
M. Hollaus;W. Mücke;B. Höfle;W. Dorigo;N. Pfeifer;W. Wagner;C. Bauerhansl;B. Regner
机载激光扫描是一种用于提取森林参数的不断发展的业务测量技术。本研究的目的是分析全波形机载激光扫描在混交林树种分类中的潜力。所用的量是回波宽度、后向散射截面以及回波在垂直方向上的分布。基于分割的树冠，计算了位于第50高度百分位数以上的所有回波的平均后向散射截面。此外，树冠密度描述了高度50百分位数以上的所有回声数与总回声数的比率，用于基于知识的针叶树和落叶树分类。取得的总体准确率为83%。此外，每个树冠段的回声宽度的标准差被应用于云杉和落叶松的分离。对红毛榉、落叶松和云杉的分类总体准确率为75%。结果表明，结合全波形机载激光扫描数据的几何信息和后向散射特性，具有较高的树种分类潜力。
Airborne laser scanning is an evolving operational measurement technique for deriving forest parameters. The objective of the current study was to analyze the potential of full-waveform airborne laser scanning for tree species classification of a mixed woodland. The quantities used were the echo width, backscatter cross section, as well as the distribution of the echoes in vertical direction. Based on segmented tree crowns the mean backscatter cross section of all echoes above the 50 th height percentile was computed. Additionally, the canopy density, describing the ratio of the number of all echoes above the 50 th height percentile and the total number of echoes, was used for a knowledge-based classification of coniferous and deciduous trees. The achieved overall accuracy was 83%. Furthermore, the standard deviation of the echo widths per crown segment was applied for a separation of spruce and larch. An overall accuracy of the classified tree species red beech, larch and spruce of 75% was obtained. The presented results show that combining geometric information and backscattering properties of full-waveform airborne laser scanning data has a high potential for tree species classification.