Table 4.

Representative vegetation indices and their definitions.

Vegetation indices	Formula	Reference
Normalized Difference Vegetation Index	NDVI = (NIR–Red)/(NIR + Red)	[17]
Green Normalized Difference Vegetation Index	GNDVI = (NIR−Green)/(NIR + Green)	[18]
Modified Triangular Vegetation Index	MTVI = 1.2 × (1.2 × (NIR−Green) − 2.5 × (Red−Green))	[19]
Modified NDVI 705	mNDVI705 = (NIR−RedEdge)/(NIR + RedEdge)	[20]
Modified Simple Ratio 705	mSR705 = NIR/RedEdge	[21]
Red–Green Ratio Index	RGRI = Red/Green	[22]
Triangular Vegetation Index	TVI = 0.5 × (120 × (NIR−Green) − 200 × (Red−Green))	[23]