Table 9 Image classification accuracy by group in four classes, where A = Asymptomatic trees, B = trees defoliated less than 50%, C = trees defoliated more than 50% and D = dead trees, PA = producer’s accuracy, UA = user’s accuracy, value shown in bold = overall accuracy. Classification and reference (field check) frequencies are arranged in rows and columns respectively

From: Assessing a novel modelling approach with high resolution UAV imagery for monitoring health status in priority riparian forests