A Crack Identification Method for Concrete Structures Using Improved U-Net Convolutional Neural Networks

Table 6

Comparison of mean_IoU of the three model test sets.

Image	U-net	Segnet	Improved U-net
Figure 12(a)	0.759	0.749	0.819
Figure 12(b)	0.810	0.711	0.815
Figure 12(c)	0.816	0.766	0.832
Figure 12(d)	0.808	0.751	0.823
Figure 12(e)	0.817	0.758	0.827
Figure 12(f)	0.799	0.771	0.806