Skip to main content

Table 4 Spectral vegetation indices used in this study to evaluate maize above ground biomass

From: Modeling maize above-ground biomass based on machine learning approaches using UAV remote-sensing data

VIs Formula Application References
CIgreen \(\frac{NIR}{GREEN} - 1\) Chlorophyll [33]
CIrededge \(\frac{NIR}{REDEDGE} - 1\) Chlorophyll [33]
CVI \(NIR * \frac{RED}{{GREEN^{2} }}\) Chlorophyll [34]
NDRE \(\frac{NIR - REDEDGE}{NIR + REDEDGE}\) Chlorophyll [35]
RVI \(\frac{NIR}{RED}\) LAI, biomass [36,37,38]
NDVI \(\frac{NIR - RED}{NIR + RED}\) Biomass [39, 40]
WDRVI \(\frac{0.1NIR - RED}{0.1NIR + RED}\) LAI, biomass [41]
GLI \(\frac{2 * GREEN - RED - BLUE}{2 * GREEN + RED + BLUE}\) Chlorophyll [42, 43]
VARI \(\frac{GREEN - RED}{GREEN + RED - BLUE}\) LAI, biomass [44, 45]
ExG \(2 * GREEN - RED - BLUE\) Canopy coverage [46]
NGRDI \(\frac{GREEN - RED}{GREEN + RED}\) Canopy coverage [39]