Table 2.

Confusion matrix for the 4-class problem (supervision 0.1).

	Homogeneous	Hole	Crack	Multiple
homogeneous	99.74	0.03	0.13	0.10
hole	0.28	83.05	15.99	0.68
crack	0.85	13.81	84.82	0.52
multiple	1.92	0.42	7.23	90.43