Table 2.
Vegetation indices used
| Index | Equation | Bands | References |
|---|---|---|---|
| “NDVI (normalized difference vegetation index) | (nir − red)/(nir + red) | Red, nir | Rouse et al., 1974 |
| NRVI (normalized ratio vegetation index) | (red/nir − 1)/(red/nir + 1) | Red, nir | Baret & Guyot, 1991 |
| WDVI (weighted difference vegetation index) | nir − s * red | Red, nir | Richardson & Wiegand, 1977 |
| RVI (ratio vegetation index) | red/nir | Red, nir | Gorai et al., 2014 |
| TTVI (Thiam’s transformed vegetation index) | sqrt(abs((nir − red)/(nir + red) + 0.5)) | Red, nir | Thiam, 1997 |
| TVI (transformed vegetation index) | sqrt((nir − red)/(nir + red) + 0.5) | Red, nir | Deering et al., 1975 |
| KNDVI (kernel normalised difference vegetation index) | tanh(((nir − red)/(nir + red)))^2 | Red, nir | Camps-Valls et al., 2021 |
| MSAVI (modified soil adjusted vegetation index) | nir + 0.5 − (0.5 * sqrt((2 * nir + 1)^2 − 8 * (nir − (2 * red)))) | Red, nir | Qi et al., 1994a |
| MSAVI2 (modified soil adjusted vegetation index 2) | (2 * (nir + 1) − sqrt((2 * nir + 1)^2 − 8 * (nir − red)))/2 | Red, nir | Qi et al., 1994b |
| CTVI (corrected transformed vegetation index) | (NDVI + 0.5)/sqrt(abs(NDVI + 0.5)) | Red, nir | Perry Jr & Lautenschlager, 1984 |
| NDREI1 (normalised difference red edge index 1) | (redEdge2 −redEdge1)/(redEdge2 + redEdge1) | Rededge2, rededge1 | Mauya & Madundo, 2021 |
| NDREI2 (normalised difference red edge index 2) | (redEdge3 − redEdge1)/(redEdge3 + redEdge1) | Rededge3, rededge1 | Mauya & Madundo, 2021 |
| MCARI (modified chlorophyll absorption ratio index) | ((redEdge1 − red) − (redEdge1 − green)) * (redEdge1/red) | Green, red, rededge1 | Daughtry et al., 2000 |
| CLRE (red-edge-band chlorophyll index) | redEdge3/redEdge1 − 1 | Rededge3, rededge1 | Mauya & Madundo, 2021 |
| SATVI (soil adjusted total vegetation index) | (swir2 − red)/(swir2 + red + L) * (1 + L) − (swir3/2) | Red, swir2, swir3 | Marsett et al., 2006 |
| SLAVI (specific leaf area vegetation index) | (nir − red) * (1 + L)/(nir + red + L) | Red, nir | Lymburger et al., 2000 |