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Table 1 Vegetation indices tested in this study

From: Remote estimation of rapeseed yield with unmanned aerial vehicle (UAV) imaging and spectral mixture analysis

Vegetation indices Formula References
Normalized Difference Vegetation Index (NDVI) \((\rho_{800} - \rho_{670} )/\left( {\rho_{800} + \rho_{670} } \right)\) Rouse et al. [62]
Red edge chlorophyll index (CIrededge) \(\rho_{800} /\rho_{720} - 1\) Gitelson et al. [63]
Green chlorophyll index (CIgreen) \(\rho_{800} /\rho_{550} - 1\) Gitelson et al. [63]
Visible Atmospherically Resistant Index (VARI) \((\rho_{550} - \rho_{670} )/\left( {\rho_{550} + \rho_{670} } \right)\) Gitelson et al. [43]
Ratio Vegetation Index (RVI) \(\rho_{800} /\rho_{670}\) Jordan et al. [64]
Difference Vegetation Index (DVI) \(\rho_{800} - \rho_{670}\) Richardson et al. [65]
Renormalized difference Vegetation Index (RDVI) \(\sqrt {NDVI \times \left( {\rho_{800} - \rho_{670} } \right)/2}\) Roujean et al. [66]
Enhanced Vegetation Index (EVI) \(2.5\left( {\rho_{800} - \rho_{670} } \right)/\left( {\rho_{800} + 6\rho_{670} - 7.5\rho_{490} + 1} \right)\) Liu et al. [67]
Triangular Vegetation Index (TVI) \(0.5\left[ {120\left( {\rho_{800} - \rho_{550} } \right) - 200\left( {(\rho_{670} - \rho_{550} } \right)} \right]\) Broge et al. [68]
Soil Adjusted Vegetation Index (SAVI) \(\left( {1 + L} \right)(\rho_{800} - \rho_{670} )/\left( {\rho_{800} + \rho_{670} + L} \right)\) Huete [69]