基于高光谱指数的棉花冠层等效水厚度估算
马岩川1,2,刘浩1,陈智芳1,张凯1,余轩1,2,王景雷1,孙景生1(
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Canopy Equivalent Water Thickness Estimation of Cotton Based on Hyperspectral Index
YanChuan MA1,2,Hao LIU1,ZhiFang CHEN1,Kai ZHANG1,Xuan YU1,2,JingLei WANG1,JingSheng SUN1()
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图2. 全生育期内CEWT与NDSI及RSI线性关系决定系数（R2）等高线图
（a）基于原始光谱构建的NDSI;（b）基于原始光谱构建的RSI;（c）基于一阶导数光谱构建的NDSI;（d）基于一阶导数光谱构建的RSI。图中纵坐标为λ1,横坐标为λ2
Fig. 2. Contour maps of coefficients of determination(R2) for linear relationship between CEWT with RSI and NDSI during the full growth period
(a) NDSI based on the original spectral; (b) RSI based on the original spectral; (c) NDSI based on the first derivative spectral; (d) RSI based on the first derivative spectral. The vertical coordinate is λ1 and the horizontal coordinate is λ2
