The Feasibility Assessment Study of Bridge Crack Width Recognition in Images Based on Special Inspection UAV

Table 13

Test results of actual arch bridge (side).

Items	6 m	5.0 m	4.0 m	3.5 m	3.0 m	2.5 m
Level 0	0.994	0.993	0.993	0.994	0.97	0.862
Level 1	0.978	0.98	0.979	0.972	0.938	0.839
Level 2	0.992	0.973	0.951	0.93	0.822	0.805