Scientia Silvae Sinicae ›› 2022, Vol. 58 ›› Issue (9): 48-59.doi: 10.11707/j.1001-7488.20220905
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Bodong Zhu,Hongbin Luo,Jing Jin,Cairong Yue*
Received:
2021-06-17
Online:
2022-09-25
Published:
2023-01-18
Contact:
Cairong Yue
CLC Number:
Bodong Zhu,Hongbin Luo,Jing Jin,Cairong Yue. Optimization of Individual Tree Segmentation Methods for High Canopy Density Plantation Based on UAV LiDAR[J]. Scientia Silvae Sinicae, 2022, 58(9): 48-59.
Table 1
The basic profile of the sample plots of the 3 age groups and the segmentation accuracy of individual trees corresponding to the 2 segmentation algorithms in each age group"
龄组 Age groups | 样地数量 Number of sample plots | 平均郁闭度 Average canopy cover | 分水岭算法 Watershed algorithm | 基于点云的局部最大值聚类算法 Local maximum clustering algorithm based on point cloud | |||||
r | p | F | r | p | F | ||||
幼龄林 Young forest | 13 | 0.82 | 0.70 | 0.89 | 0.78 | 0.53 | 0.92 | 0.64 | |
中龄林 Middle-aged forest | 14 | 0.79 | 0.60 | 0.80 | 0.68 | 0.53 | 0.88 | 0.66 | |
近熟林 Near-mature forest | 9 | 0.82 | 0.60 | 0.79 | 0.67 | 0.72 | 0.85 | 0.77 |
Table 2
Accuracy assessments of individual tree segmentation"
精度验证指标 Index for accuracy assessments | 分水岭算法 Watershed algorithm | 基于点云的局部最大值聚类算法 Local maximum clustering algorithm based on point cloud | 基于冠层起伏率的点云分层分割法 layered segmentation method based on CRR, combined with watershed algorithm and the local maximum clustering algorithm based on point cloud |
r | 0.63 | 0.58 | 0.67 |
p | 0.83 | 0.89 | 0.86 |
F | 0.71 | 0.68 | 0.75 |
Table 3
Influence of CHM resolution and interpolation method on segmentation accuracy in watershed algorithm"
CHM空间分辨率 CHM resolutions | 指标 Index | 插值方法Interpolation method | ||
反距离权重 IDW | 克里金 Kriging | 不规则三角网 TIN | ||
0.2 m×0.2 m | r | 1.00 | 1.00 | 1.00 |
p | 0.28 | 0.25 | 0.26 | |
F | 0.44 | 0.40 | 0.42 | |
0.5 m×0.5 m | r | 0.70 | 0.73 | 0.73 |
p | 0.94 | 0.89 | 0.82 | |
F | 0.81 | 0.80 | 0.77 | |
0.8 m×0.8 m | r | 0.32 | 0.32 | 0.43 |
p | 0.93 | 0.93 | 0.95 | |
F | 0.47 | 0.47 | 0.59 | |
1.0 m×1.0 m | r | 1.00 | 1.00 | 1.00 |
p | 0.23 | 0.23 | 0.30 | |
F | 0.37 | 0.37 | 0.46 |
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