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Table 10 Image classification accuracy by group in three classes, where A = Asymptomatic trees, B + C = defoliated trees, 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

   Predicted   
Health status A B + C D PA
Observed A 24 6 0 30 0.8
B+ C 5 18 3 26 0.69
D 0 2 23 25 0.92
29 26 26 65  
  UA 0.83 0.69 0.88   0.80
  1. Kappa index = 0.73