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- W2891665163 abstract "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." @default.
- W2891665163 created "2018-09-27" @default.
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- W2891665163 date "2018-12-01" @default.
- W2891665163 modified "2023-10-15" @default.
- W2891665163 title "Estimation of forest leaf area index using terrestrial laser scanning data and path length distribution model in open-canopy forests" @default.
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- W2891665163 doi "https://doi.org/10.1016/j.agrformet.2018.09.006" @default.
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