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

Table 5

Comparison of recall of the three model test sets.

Image	U-net	Segnet	Improved U-net
Figure 12(a)	0.879	0.884	0.920
Figure 12(b)	0.883	0.933	0.935
Figure 12(c)	0.931	0.967	0.982
Figure 12(d)	0.924	0.932	0.973
Figure 12(e)	0.968	0.875	0.969
Figure 12(f)	0.889	0.884	0.956