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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