Novel algorithms for remote estimation of vegetation fraction

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RED EDGE AS A POTENTIAL INDEX FOR DETECTING DIFFERENCES IN PLANT NITROGEN STATUS IN WINTER WHEAT (2012, background): “Gitelson et al. (2002) listed several possible reasons for low sensitivity of NDVI.”
Wide Dynamic Range Vegetation Index for remote quantification of biophysical characteristics of vegetation. (2004, methodology): “Generally, NDVI approaches saturation asymptotically under moderate-to-high biomass conditions and for certain ranges of the LAI and the VF (e.g., Sellers 1985, Baret and Guyot 1991, Buschmann and Nagel 1993, Gitelson et al. 2002 a, b, 2003).”
Verification of color vegetation indices for automated crop imaging applications (2008, methodology): “Woebbecke’s excess green (ExG) index has been idely cited and used in recent studies (Giltelson et al., 2002; amm et al., 2002; Mao et al., 2003; and others). Other color vegetation indices have been proposed to seprate plants from soil and residue background images. For xample, the normalized diffe”