Table 3.
Commonly used vegetation indices for plant stress phenotyping. Rn, Rre, Rr, Rg, and Rb are the reflectance bands for NIR, Red Edge, red, green, and blue wavelengths
| Index name | Formula | Relevance | References |
|---|---|---|---|
| Normalized difference vegetation Index | (Rn − Rr)/(Rn + Rr) | Plant health monitoring, assess plant stress | Tucker (1979) |
| Triangular vegetation index | 0.5 [120(Rn − Rg) − 200 (Rr − Rg)] | Leaf chlorophyll measurements and leaf area index | Broge and Leblanc (2001) |
| Triangular greenness index | Rg − 0.39·Rr − 0.61·Rb | Leaf chlorophyll measurements | Hunt et al. (2011) |
| Normalized green red difference index | (Rg − Rr)/(Rg + Rr) | Biomass measurements | Tucker (1979) |
| Green normalized difference vegetation index | (Rn − Rg)/(Rn + Rg) | Leaf chlorophyll measurements | Gitelson et al. (1996) |
| Enhanced vegetation index | 2.5(Rn − Rr)/(Rn + 6·Rr − 7.5·Rb + 1) | Improved vegetation monitoring and biomass measurements | Huete et al. (2002) |
| Chlorophyll vegetation index | Rn·Rr/Rg2 | Leaf chlorophyll measurements | Vincini et al. (2008) |
| Chlorophyll index—green | Rn/Rg − 1 | Leaf chlorophyll measurements | Gitelson et al. (2003) |
| Chlorophyll index—red edge | Rn/Rre − 1 | Leaf chlorophyll measurements | Gitelson et al. (2003) |
| Visible atmospherically resistant index | (Rg − Rr)/(Rg + Rr − Rb) | Highlights vegetation in images | Gitelson et al. (2002) |
| Triangular chlorophyll index | 1.2(R700 − R550) − 1.5(R670 − R550)·√(R700/R670) | Leaf chlorophyll measurements | Haboudane et al. (2008) |
| Green leaf index | (2·Rg − Rr − Rb)/(2·Rg + Rr + Rb) | Differentiates vegetation from bare soil | Louhaichi et al. (2001) |
| Normalized difference red edge index | (Rn − Rre)/(Rn + Rre) | Leaf chlorophyll measurements | Gitelson and Merzlyak (1994) |
| MERIS total chlorophyll index | (R750 − R710)/(R710 − R680) | Leaf chlorophyll measurements | Dash and Curran (2004) |