Fig. 8From: Method for accurate multi-growth-stage estimation of fractional vegetation cover using unmanned aerial vehicle remote sensingReference FVC (FVCref) and FVC estimated by using different SIs and methods (PROSAIL-based dataset). LAN linear and nonlinear regression, PDM pixel dichotomy model, FSM fan-shaped method. FVCref is the reference FVC calculated from Eq. (1)); FVCNDVI, FVCNDVI2, FVCRDVI2, and FVCSAVI are FVC estimates based on a NDVI, NDVI2, RDVI, SAVI, and b LAN, PDM, and FSMBack to article page