Applying RGB- and Thermal-Based Vegetation Indices from UAVs for High-Throughput Field Phenotyping of Drought Tolerance in Forage Grasses. - Tom De Swaef; Wouter H. Maes; Jonas Aper; Joost Baert; Mathias Cougnon; Dirk Reheul; Kathy Steppe; Isabel Roldán-Ruiz; Peter Lootens (Remote. Sens., 2021)