Table 2.

Extraction of vegetation indices (VIs) from hyperspectral imagery data.

No.	Vegetation Index	Acronym	Equation	References
Pigment
1	Anthocyanin (Gitelson)	AntGitelson	AntGitelson = (1/R550 − 1/R700) × R780	[52]
2	Chlorophyll Index	CI	CI = (R750 − R705)/(R750 + R705)	[53]
3	Optimized Soil-Adjusted Vegetation Index	OSAVI	OSAVI = (1 + 0.16) × (R800 − R670)/(R800 + R670 + 0.16)	[54]
4	Red–Green Index	RGI	RGI = R690/R550	[55]
5	Structure Intensive Pigment Index	SIPI	SIPI = (R800 − R450)/(R800 + R650)	[56]
6	Transformed Chlorophyll Absorption in Reflectance Index	TCARI	TCARI = 3 × ((R700 − R670) − 0.2 × (R700 − R550) × (R700/R670))	[57]
7	Nitrogen Reflectance Index (NRI)	NRI	NRI = (R570 − R670)/(R570 + R670)	[58]
8	Modified Chlorophyll Absorption in Reflectance Index	mCARI	mCARI = 1.2 × (2.5 × (R761 − R651) − 1.3 × (R761 − R581))	[59]
9	Photochemical Reflectance Index	PRI	PRI = (R531 − R570)/(R531 + R570)	[60]
10	Ratio Analysis of Reflectance of Spectral Chlorophyll a	RARSa	RARSa = R675/R700	[61]
11	Ratio Analysis of Reflectance of Spectral Chlorophyll b	RARSb	RARSb = R675/(R700 × R650)	[61]
12	Ratio Analysis of Reflectance of Spectral Chlorophyll b	RARSc	RARSc = R760/R500	[61]
13	Pigment-Specific Simple Ratio	PSSR	PSSR = R800/R680	[62]
14	Plant Senescence Reflectance Index	PSRI	PSRI = (R660 − R510)/R760	[63]
15	Normalized Chlorophyll Pigment Ratio Index	NCPI	NCPI = (R670 − R450)/(R670 + R450)	[56]
16	Plant Pigment Ratio	PPR	PPR = (R550 − R450)/(R550 + R450)	[64]
Structure
17	Normalized Difference Vegetation Index	NDVI	NDVI = (R860 − R670)/(R860 + R670)	[65]
18	Greenness Index	GI	GI = R554/R677	[55]
19	Green NDVI	GNDVI	GNDVI = (R750 − R540 + R570)/(R750 + R540 − R570)	[66]
20	Simple Ratio	SR	SR = R900/R680	[67]
21	Red-Edge NDVI	RNDVI	RNDVI = (R750 − R705)/(R750 + R705)	[68]
22	Modified Triangular Vegetation Index	MTVI	MTVI = 1.2 × (1.2 × (R800 − R550) − 2.5 × (R670 − R550))	[59]
23	Triangular Vegetation Index	TVI	TVI = 0.5 × (120 × (R761 − R581) − 200(R651 − R581))	[69]
Physiology
24	Fluorescence Ratio Index 1	FRI1	FRI1 = R690/R630	[70]
25	Fluorescence Ratio Index 2	FRI2	FRI2 = R750/R800	[71]
26	Fluorescence Ratio Index 3	FRI3	FRI3 = R690/R600	[72]
27	Fluorescence Ratio Index 4	FRI4	FRI4 = R740/R800	[72]
28	Fluorescence Curvature Index	FCI	FCI = R2683/(R675×R691)	[70]
29	Modified Red-Edge Simple Ratio Index	mRESR	mRESR = (R750 − R445)/(R705 + R445)	[73]
30	Normalized Pheophytization Index	NPQI	NPQI = (R415 − R435)/(R415 + R435)	[74]
31	Red-Edge Vegetation Stress Index 1	RVS1	RVS1 = ((R651 + R750)/2) − R733	[75]
32	Red-Edge Vegetation Stress Index 2	RVS2	RVS2 = ((R651 + R750)/2) − R751	[75]
Water content
33	Water Index	WI	WI = R900/R970	[76]
34	Water Stress and Canopy Temperature	WSCT	WSCT = (R970 − R850)/(R970 + R850)	[77]