Qualified

Scorch

Color pollution

Convex marks

Indentation

Dirty

Impurity

Hole

max ( D c )

12.96

78.43

77.08

29.42

11.23

20.92

17.35

27.59

mean ( D c )

5.25

17.86

17.48

9.21

6.40

11.29

9.44

11.47

θ

0

0.022

0.003

0

0

0

0

0