Table 2 Vegetation Indices (VI) tested in this study
VI | Formula | References |
|---|---|---|
NDVI | \((\rho_{NIR} - \rho_{red} )/(\rho_{NIR} + \rho_{red} )\) | Rouse et al. [71] |
EVI2 | \(2.5 \times (\rho_{NIR} - \rho_{red} )/(1 + \rho_{NIR} + 2.4 \times \rho_{red} )\) | Jiang et al. [35] |
WDRVI | \((\alpha \times \rho_{NIR} - \rho_{red} )/(\alpha \times \rho_{NIR} + \rho_{red} )\), \(\alpha = 0.2\) | Gitelson et al. [72] |
\({\text{CI}}_{{{\text{green}}}}\) | \(\rho_{NIR} /\rho_{green} - 1\) | Gitelson et al. [73] |
\({\text{CI}}_{{{\text{rededge}}}}\) | \(\rho_{NIR} /\rho_{red edge} - 1\) | Gitelson et al. [73] |
NDRE | \((\rho_{NIR} - \rho_{red edge} )/(\rho_{NIR} + \rho_{red edge} )\) | Gitelson et al. [74] |
MTCI | \((\rho_{NIR} - \rho_{red edge} )/(\rho_{red edge} - \rho_{red} )\) | Dash et al. [75] |
OSAVI | \((1 + 0.16) \times (\rho_{NIR} - \rho_{red edge} )/(\rho_{NIR} + \rho_{red edge} + 0.16)\) | Steven et al. [76] |