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Table 5 Image classification accuracy by group in the four classes considered, where A = Asymptomatic trees, B = trees with less than 50% defoliation, C = trees with more than 50% defoliation, 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 4 2 0 30 0.80
B 7 4 1 0 12 0.33
C 3 3 2 6 14 0.14
D 0 0 1 24 25 0.96
  34 11 6 30 54  
  UA 0.71 0.36 0.33 0.80   0.67
  1. Kappa index = 0.52