基于BP神经网络的夏玉米多生育期叶面积指数反演研究

刘俊,孟庆岩,葛小三,刘顺喜,陈旭,孙云晓

Leaf Area Index Inversion of Summer Maize at Multiple Growth Stages based on BP Neural Network

Jun Liu,Qingyan Meng,Xiaosan Ge,Shunxi Liu,Xu Chen,Yunxiao Sun

表2 统计模型各植被指数反演精度

Table 2 Inversion precision of each vegetation index in statistical model

植被指数	拟合公式	决定系数（R ²）	均方根误差（RMSE）
NDVI	$y = 5.3675 x + 0.3623$	0.78	0.42
NDVI	$y = 1.5534 e^{2.1535 x}$	0.83	0.39
RVI	$y = 2.1433 x + 2.134$	0.71	0.41
RVI	$y = 0.6642 e^{2.132 x}$	0.72	0.41
DVI	$y = 3.1933 x + 0.1656$	0.68	0.51
DVI	$y = 3.1654 e^{1.1175 x}$	0.70	0.47
EVI	$y = 3.2124 x + 0.4045$	0.72	0.47
EVI	$y = 2.4041 e^{1.5156 x}$	0.75	0.45
SAVI	$y = 0.536 x + 3.431$	0.74	0.43
SAVI	$y = 3.534 e^{0.3424 x}$	0.76	0.42
ARVI	$y = 0.6857 x + 2.837$	0.74	0.45
ARVI	$y = 2.849 e^{1.1175 x}$	0.76	0.42