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

Table 7

Test results of arch bridge (tailwind, side).

Items	6 m	5.0 m	4.0 m	3.5 m	3.0 m	2.5 m
Level 0	0.994	0.992	0.996	0.994	0.989	0.847
Level 1	0.978	0.99	0.983	0.97	0.976	0.833
Level 2	0.987	0.984	0.98	0.967	0.967	0.828