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

Table 14

Test results of actual arch bridge (bottom).

Items	3 m	2.6 m	2.2 m	2.0 m	1.8 m	1.6 m
Level 0	0.997	0.986	0.984	0.985	0.983	0.997
Level 1	0.985	0.982	0.972	0.963	0.83	0.812
Level 2	0.982	0.979	0.94	0.83	0.806	0.791