无人机多光谱反演黄河口重度盐渍土盐分的研究

王丹阳,陈红艳,王桂峰,丛津桥,王向锋,魏学文

Salinity Inversion of Severe Saline Soil in the Yellow River Estuary Based on UAV Multi-Spectra

WANG DanYang,CHEN HongYan,WANG GuiFeng,CONG JinQiao,WANG XiangFeng,WEI XueWen

表2 光谱指数分析

Table 2 Analysis of spectral parameters

序号 Number 光谱指数 Spcetral index 相关系数 Correlation coefficient 灰色关联度指数 Grey correlation index 1 r+nir -0.645** -0.720** 2 R×nir -0.600* -0.708** 3 r/g -0.185 -0.756** 4 R+nir+g -0.641** -0.665** 5 $\sqrt{r^{2}+reg^{2}}$ -0.601** -0.668** 6 g×nir -0.562* -0.658* 7 g+reg -0.603* -0.671* 8 (r+g)/(r-g) -0.015 -0.471* 9 g×r -0.145 -0.701* 10 $\sqrt{r^{2}+g^{2}}$ -0.640** -0.700** 11 r+nir+reg -0.631** -0.709** 12 r×reg -0.591* -0.649* 13 r+reg -0.634** -0.691** 14 (reg-r)/( reg+r) 0.252 -0.183 15 g×nir×r -0.556* -0.603* 16 g+r+reg -0.632* -0.678* 17 g×r×reg -0.037 -0.576* 18 g×reg -0.124 -0.609* 19 (reg-g)/( reg+g) 0.148 -0.354 20 r-g -0.21 -0.206 21 reg-r 0.048 -0.079 22 reg/r -0.17 -0.709* 23 $\sqrt{g^{2}+reg^{2}+r^{2}}$ -0.601* -0.668* 24 $\sqrt{r\times reg}$ -0.634* -0.689* 25 $\sqrt{r\times r}$ -0.643* -0.702* 26 $\sqrt{g^{2}+reg^{2}}$ -0.605* -0.669* 27 (reg+g)/(g-reg) 0.117 -0.238 28 (r+g)/(r-g) -0.015 -0.471* 29 $\sqrt{reg\times g}$ -0.631* -0.679* 30 $\sqrt{reg \times r \times g}$ -0.613* -0.689* 31 r+nir+g+reg -0.631* -0.660* 32 r+nir+g -0.641* -0.665* 33 nir+g+reg -0.606* -0.652*