TY - T1 - Direct reflectance transformation methodology for drone-based hyperspectral imaging SN - / 0034-4257; 1879-0704 UR - http://hdl.handle.net/10138/334925 T3 - Remote Sensing of Environment A1 - Suomalainen, Juha; Oliveira, Raquel A.; Hakala, Teemu; Koivumäki, Niko; Markelin, Lauri; Näsi, Roope; Honkavaara, Eija A2 - PB - Elsevier Y1 - 2021 LA - en AB - Multi- and hyperspectral cameras on drones can be valuable tools in environmental monitoring. A significant shortcoming complicating their usage in quantitative remote sensing applications is insufficient robust radiometric calibration methods. In a direct reflectance transformation method, the drone is equipped with a camera and an irradiance sensor, allowing transformation of image pixel values to reflectance factors without ground reference data. This method requires the sensors to be calibra... VO - 266 IS - SP - OP - KW - Remote sensing; Drone; UAV; Hyperspectral; Imaging; Direct reflectance; Atmospheric correction; Empirical line method; Radiometric calibration; Reflectance factor; Irradiance; Radiance N1 - PP - ER -