Table 6.

Remote sensing features and their calculation formulas.

Abbreviation	Full Name	Calculation Formulas	Serial Number
B	Blue band	$B=\sum _{i,j}{P}_{i,j}/N^2$	(10)
H	Hue	$H=\frac{1}{N_p}\sum _{(i,j)\in mask}{P}_H(i,j)$	(11)
RGRI	Red-Green Ratio Index	RGRI=R/G	(12)
WIstd	Width Index Standard Deviation	$W{I}_{std}=\sqrt{\frac{1}{N}\sum _{i=1}^N{(WI(i)-W{I}_{mean})}^2}$	(13)
NGRDI	Normalized Green-Red Difference Index	NGRDI=(G-R)/(G+R)	(14)
VARI	Visible Atmospherically Resistant Index	VARI=(G-R)/(G+R-B)	(15)
MGVRI	Modified Green-Red Vegetation Index	MGVRI=(G2- R2)/(G2 + R2)	(16)
GRVI	Green-Red Vegetation Index	GRVI=(G-R)/(G+R)	(17)
NDGI	Normalized Difference Greenness Index	NDGI=(G-R)/(G+R)	(18)
GRNDVI	Green-Red Normalized Difference Vegetation Index	GRNDVI=/(NIR/R)*[(NIR-R)/(NIR+R)+1]	(19)
NDRE	Normalized Difference Red Edge Index	NDRE=(NIR-RE)/(NIR+RE)	(20)
WImean	Width Index Mean	$W{I}_{mean}=\frac{1}{N}\sum _{i=1}^{N}WI(i)$	(21)
a	color channel a average	$a=\frac{1}{N_p}\sum _{(i,j)\in mask}{p}_a(i,j)$	(22)
ExR	Excess Red Index	EXR=1.4R-G	(23)
ExGR	Excess Green minus Excess Red Index	ExGR=ExG-1.4R-G	(24)
GNDVI	Green Normalized Difference Vegetation Index	GNDVI=(NIR–G)/(NIR+G)	(25)
G	Green band	$G=\sum _{i,j}{P}_{i,j}/N^2$	(26)
COM	Combination Coefficient	COM=0.25ExG+0.3ExGR+0.33CIVE+0.12VEG	(27)

i denotes the number of rows of pixels, j denotes the number of columns of pixels, P(i, j) denotes the grayscale value at position (i, j) in the image, x and y denote the variances of px(i) and px(j), N denotes the number of rows or columns, and RE, NIR, R, B, G denote the average reflectance of the red edge band, near-infrared band, red band, blue band, and green band respectively.