Table 1.
The spectral indices used in this study.
| Spectral Index | Equation | Reference |
|---|---|---|
| MSR | (R800/R760 − 1)/(R800/R670 + 1)1/2 | [33] |
| NDVI | (R750 − R706)/(R750 + R706) | [34] |
| OSAVI | 1.16 × (R800 − R670)/(R800 + R670 + 0.16) | [35] |
| PSND | (R800 − R470)/(R800 + R470) | [36] |
| NPCI | (R670 − R460)/(R670 + R460) | [37] |
| PBI | R810/R560 | [38] |
| TVI | 0.5 × [120(R750 − R550) – 200 × (R670 − R550)] | [39] |
| RDVI | (R800 − R670)/(R800 + R670)1/2 | [40] |
| SPVI | 0.4 × [3.7(R800 − R670) − 1.2 × |R530 − R670|] | [41] |
| SR | R750/R550 | [42] |
| TCARI | 3 × [(R700 − R670) − 0.2 × (R700 − R550)(R700/R670)] | [43] |
| MCARI | ((R700 − R670) − 0.2 × (R700 − R550))(R700/R670) | [43] |
| EVI2 | 2.5 × (R800 − R670)/(R800 + 2.4 × R670 + 1) | [44] |
| PSSR | R800/R500 | [36] |
| RARS | R760/R500 | [45] |
| WDRVI | (0.1 × R800 − R670)/(0.1 × R800 + R670) | [46] |
| LCI | (R850 − R710)/(R850 + R670)1/2 | [47] |
| PSRI | (R680 − R500)/R750 | [48] |
| RVSI | [(R712 + R752)/2] − R732 | [49] |
| GI | R554/R677 | [50] |
Note: MSR: modified simple ratio index; NDVI: normalized difference vegetation index; OSAVI: optimized soil adjusted vegetation index; PSND: pigment-specific normalized difference index; NPCI: normalized pigment chlorophyll ratio index; PBI: plant biochemical index; TVI: triangular vegetation index; RDVI: renormalized difference vegetation index; SPVI: spectral polygon vegetation index; SR: simple ratio vegetation index; TCARI: transformed chlorophyll absorption ratio index; MCARI: modified chlorophyll absorption ratio index; EVI2: two-band enhanced vegetation index; PSSR: pigment-specific simple ratio; RARS: ratio analysis of reflectance spectra; WDRVI: modified wide dynamic range vegetation index; LCI: linear combination index; PSRI: plant senescence reflectance index; RVSI: red-edge vegetation stress index; GI: greenness index.