Drones

Transfer Learning from Citizen Science Photographs Enables Plant Species Identification in UAV Imagery

Accurate information on the spatial distribution of plant species and communities is in high demand for various fields of application, such as nature conservation, forestry, and agriculture. A series of studies has shown that Convolutional Neural …

Pilot Study on the Retrieval of DBH and Diameter Distribution of Deciduous Forest Stands Using Cast Shadows in UAV-Based Orthomosaics

One fundamental metric to characterize trees and forest stands is the diameter at breast height (DBH). However, the vertical geometry of tree stems hampers a direct measurement by means of orthographic aerial imagery. Nevertheless, the DBH in …