联合无人机激光雷达和高光谱数据反演玉米叶面积指数

张亚倩,骆社周,王成,习晓环,聂胜,黎东,李光辉

Combining UAV LiDAR and Hyperspectral Data for Retrieving Maize Leaf Area Index

Yaqian Zhang,Shezhou Luo,Cheng Wang,Xiaohuan Xi,Sheng Nie,Dong Li,Guanghui Li

表3 不同采样尺寸和高度阈值下LAI预测值与实测值的回归分析

Table 3 Regression analysis of LAI predicted value and measured value under different sampling sizes and height thresholds

高度阈值/m 采样尺寸/m 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 R2 R2 R2 R2 R2 R2 R2 R2 R2 R2 R2 0.00 0.707 0.754 0.763 0.786 0.800 0.815 0.820 0.814 0.809 0.792 0.774 0.05 0.710 0.737 0.764 0.787 0.801 0.817 0.826 0.825 0.822 0.809 0.795 0.01 0.724 0.747 0.773 0.796 0.811 0.828 0.838 0.841 0.840 0.830 0.817 0.15 0.731 0.752 0.779 0.804 0.818 0.835 0.845 0.850 0.850 0.841 0.830 0.20 0.739 0.759 0.784 0.809 0.823 0.839 0.850 0.855 0.855 0.847 0.836 0.25 0.742 0.761 0.788 0.812 0.827 0.843 0.853 0.858 0.858 0.850 0.840 0.30 0.744 0.763 0.790 0.815 0.829 0.845 0.854 0.860 0.860 0.852 0.842 0.35 0.746 0.765 0.791 0.816 0.830 0.846 0.856 0.861 0.862 0.854 0.844 0.40 0.748 0.767 0.793 0.818 0.832 0.848 0.857 0.863 0.863 0.856 0.846 0.45 0.749 0.767 0.793 0.818 0.833 0.849 0.858 0.864 0.864 0.858 0.848 0.50 0.749 0.768 0.794 0.819 0.834 0.850 0.859 0.865 0.866 0.860 0.850 0.55 0.749 0.768 0.794 0.820 0.835 0.851 0.860 0.866 0.866 0.861 0.852 0.60 0.750 0.768 0.795 0.820 0.834 0.851 0.860 0.866 0.867 0.862 0.854 0.65 0.749 0.767 0.793 0.819 0.834 0.850 0.859 0.866 0.866 0.863 0.855