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Table 6 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 23 7 0 30 0.77
B + C 9 12 5 26 0.46
D 0 2 23 25 0.92
  32 21 28 58  
  UA 0.72 0.57 0.82   0.72
  1. Kappa index = 0.62