95%分位数高度
95% quantile height | 近似于森林冠层峰值高度, 由首次回波统计获得
Approximates the peak height in meters of the forest canopy, obtained from the point cloud of the first echo | Ria?o et al., 2004 |
平均植被高度
Mean vegetation height | 植被的平均高度, 由各植被分层首次回波和末次回波统计获得
The mean height of vegetation, obtained from the point cloud of the first and last echo of each vegetation layer | Lefsky et al., 2002 |
植被穿透率
Vegetation permeability | 植被首次回波在二次回波中的比例, 由植被的首次回波和所有二次回波计算得到
Proportion of first vegetation returns (see above) for which there is a second return, obtained from the point cloud of the first echo and all secondary echoes of vegetation | Moffiet et al., 2005 |
叶高度多样性
Foliage height diversity | 描述植被剖面的叶密度和高度分布, 公式: $h=-\mathop{\sum }^{}{{p}_{i}}\ln {{p}_{i}}$, 其中, pi表示不同高度间隔内的点云返回值与所有返回值的比例, h表示树高
Metric intended to characterize the density and height distribution of foliage in a vegetation profile. Formula: $h=-\mathop{\sum }^{}{{p}_{i}}\ln {{p}_{i}}$, where pi is the ratio of return value of point cloud in different height intervals to all return values, h is the tree height | Clawges et al., 2008 |
标准偏差(首次回波)
Standard deviation (first return) | 反映单木树高的离散程度 Metric the dispersion of each individual tree | Nelson et al., 1988 |
平均绝对偏差
Mean absolute deviation | 所有单木树高值与其算术平均值的偏差的绝对值的平均
Mean of absolute value of the deviation of tree height from the mean | Zhao et al., 2018 |
偏度(首次回波)
Skewness (first return) | 与峰态(首次回波)高度相关
Highly correlated with kurtosis | Antonarakis et al., 2008 |