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Table 2 Spectral indices and texture from NDVI computed from the images captured by the Parrot Sequoia multispectral sensor at crown level

From: Assessing a novel modelling approach with high resolution UAV imagery for monitoring health status in priority riparian forests

Class Variable Formula Reference
Spectral (Multispectral sensor)
 Normalized difference vegetation index NDVI NDVI = (B4 – B2) / (B4 + B2) (Rouse Jr et al. 1974)
 Green NDVI GNDVI GNDVI = (B4 – B1) / (B4 + B1) (Gitelson et al. 1996)
 Red edge normalised difference Vegetation index RENDVI RENDVI = (B4 – B3) / (B4 + B3) (Gitelson and Merzlyak 1994)
 Green RENVI REGNDVI REGNDVI = (B3 – B1) / (B3 + B1) (Buschmann and Nagel 1993)
 Red RENVI RERNDVI REGNDVI = (B3 – B2) / (B3 + B2) (Barnes et al. 2000)
 Normalized green-red vegetation index NGRVI NGRVI = (B1 – B2) / (B1 + B2) (Motohka et al. 2010)
 Non-linear index NLI NLI = (B4^2 – B2) / (B4^2 + B2) (Goel and Qin 1994)
 Optimized soil adjusted vegetation index OSAVI SAVI = ((B4 – B2) / ((B4 + B2) + 0.15)) × (1 + 0.5) (Huete 1988)
Texture ndvi_GLCM
(window size of 3 × 3 pixels and a 45 degree shift)
“mean”, “variance”, “homogeneity”, “contrast”, “dissimilarity”, “entropy”, “second_moment”, “correlation”  
  1. B1: Green Band; B2: Red Band; B3: Red-edge Band; B4: NIR band