Estimation of forest leaf area index using terrestrial laser scanning data and path length distribution model in open-canopy forests
Estimation of forest leaf area index using terrestrial laser scanning data and path length distribution model in open-canopy forests
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利用地面激光扫描数据和开放林冠路径长度分布模型估算森林叶面积指数
DOI：
10.1016/j.agrformet.2018.09.006
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发表时间：
2018-12
影响因子：
6.2
通讯作者：
Yan Guangjian
中科院分区：
文献类型：
--
作者：
Chen Yiming;Zhang Wuming;Hu Ronghai;Qi Jianbo;Shao Jie;Li Dan;Wan Peng;Qiao Chen;Shen Aojie;Yan Guangjian
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Terrestrial Laser Scanning (TLS) is an active technology that can acquire the finest characteristics of canopy structure and plays an increasing role in estimating Leaf Area Index (LAI) in forest canopies. However, 3D information is not directly used in conventional TLS-based methods using the gap fraction theory. In addition, quantifying clumping effect within canopies is still a difficult task. In this paper, we presented a method to reduce clumping effect and estimate LAI using TLS data. Our recently proposed path length distribution model was applied to TLS data. Instead of converting 3D points to 2D image, the path length distribution can be extracted using the TLS-recorded 3D data and the crown models built with the alpha shapes algorithm. Two simulated scenes and one actual forest plot were utilized for validation. The results of the proposed method agree well with both the true LAI (in the simulated scenes) and the extracted PAI by the digital hemispherical photography (in the actual plot). This LAI estimation method using TLS and the path length distribution model provides a novel way for ground-based LAI measurements and shows its great potential.
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影响因子：
13.5
作者：
Hyde, Peter;Dubayah, Ralph;Hunsaker, Carolyn
通讯作者：
Hunsaker, Carolyn
DOI：
10.1109/igarss.2015.7326179
发表时间：
2015-07
期刊：
2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
影响因子：
--
作者：
Ronghai Hu;Jinghui Luo;G. Yan;Jie Zou
通讯作者：
Ronghai Hu;Jinghui Luo;G. Yan;Jie Zou
DOI：
10.3390/rs70201877
发表时间：
2015-02
期刊：
Remote. Sens.
影响因子：
--
作者：
Shruthi Srinivasan;S. Popescu;Marian Eriksson;R. Sheridan;N. Ku
通讯作者：
Shruthi Srinivasan;S. Popescu;Marian Eriksson;R. Sheridan;N. Ku
DOI：
10.1016/j.isprsjprs.2010.08.006
发表时间：
2011-01-01
影响因子：
12.7
作者：
Lovell, J. L.;Jupp, D. L. B.;Culvenor, D. S.
通讯作者：
Culvenor, D. S.
DOI：
--
发表时间：
2013-10
期刊：
--
影响因子：
--
作者：
J. Monteith;M. Unsworth
通讯作者：
J. Monteith;M. Unsworth