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Table 9 Classification confusion matrix of random forest (RF) classifier using vegetation indices, red edge parameters, moisture indices, and combined all variables based on ground spectral data

From: Early detection of pine wilt disease in Pinus tabuliformis in North China using a field portable spectrometer and UAV-based hyperspectral imagery

Stage

Vegetation Indices

Red Edge Parameters

H

E

M

S

Total

UA (%)

H

E

M

S

Total

UA (%)

H

29

7

0

0

36

80.56

32

7

0

0

39

82.05

E

8

17

3

0

28

60.71

5

17

1

0

23

73.91

M

1

2

22

3

28

78.57

1

2

24

3

30

80.00

S

1

1

4

23

29

79.31

1

1

4

23

29

79.31

Total

39

27

29

26

121

 

39

27

29

26

121

 

PA (%)

74.36

62.96

75.86

88.46

OA (%)

75.21

82.05

62.96

82.76

88.46

OA (%)

79.34

     

Kappa

0.66

    

Kappa

0.67

Stage

Moisture Indices

Combined

H

E

M

S

Total

UA (%)

H

E

M

S

Total

UA (%)

H

29

9

1

0

39

74.36

32

8

0

0

40

80.00

E

9

15

1

1

26

57.69

5

17

2

0

24

70.83

M

0

3

24

3

30

80.00

2

2

24

2

30

80.00

S

1

0

3

22

26

84.62

0

0

3

24

27

88.89

Total

39

27

29

26

121

 

39

27

29

26

121

 

PA (%)

74.36

55.56

82.76

84.62

OA (%)

74.38

82.05

62.96

82.76

92.31

OA (%)

80.17

     

Kappa

0.65

    

Kappa

0.73