A Practical UAV Remote Sensing Methodology to Generate Multispectral Orthophotos for Vineyards: Estimation of Spectral Reflectance Using Compact Digital Cameras

摘要: This paper explores the use of compact digital cameras to remotely estimate spectral reflectance based on unmanned aerial vehicle imagery. Two cameras, one unaltered and altered, were used collect four bands information blue, green, red, near-infrared [NIR]. The altered camera had its internal hot mirror removed allow sensor be additionally sensitive NIR. Through on-ground experimentation with targets a spectroradiometer, sensitivity abilities observed. along on-site collected data aid in converting imagery numbers estimates scaled surface using empirical line method. resulting images create spectrally-consistent orthophotomosaics vineyard study site. Individual subsequently validated situ spectroradiometer data. Results show that red NIR exhibited best fit R2: 0.78 for red; 0.57