基于客观阈值与随机森林Gini指标的水体遥感指数对比

王一帆,徐涵秋

Comparison of Remote Sensing Water Indices based on Objective Threshold Value and the Random Forest Gini Coefficient

Yifan Wang,Hanqiu Xu

表6 L8影像的Gini指标重要性排序

Table 6 Variable importance of 9 feature bands ranked by Gini coefficients of random forest based on L8 images

特征波段 福州 弗伦奇岛 尼玛县 重要性均值 重要性排序 Gini值 重要性 Gini值 重要性 Gini值 重要性 AWEI 1 274.94 2 57.93 6 1 794.62 4 4 5 MNDWI 1 211.03 3 72.03 2 4 603.92 1 2 1 WI2015 1 559.79 1 75.74 1 1 419.84 5 2.33 2 Band 2 4.31 8 0.00 8 0.56 9 8.33 8 Band 3 0.83 9 0.00 9 0.75 8 8.67 9 Band 4 34.20 7 56.56 7 85.09 7 7 7 Band 5 243.71 6 60.42 5 520.97 6 5.67 6 Band 6 487.96 4 60.97 4 3 619.08 2 3.33 3 Band 7 376.42 5 71.84 3 2 432.77 3 3.67 4