Computer Vision-Based Detection for Delayed Fracture of Bolts in Steel Bridges

Table 2

The average precision (AP) of the detectors using different training sets (%).

Training set	DAOR	DABT	DAGB	DAPT	DAFL	DASC
AP0.5	84.62	81.81	81.29	89.14	86.37	82.99
Increment	—	-2.81	-3.33	4.52	1.75	-1.63
AP0.6	70.09	75.16	67.31	83.48	75.93	69.39
Increment	—	5.07	-2.78	13.39	5.84	-0.7
AP0.7	42.11	47.55	38.73	60.56	48.87	46.69
Increment	—	5.44	-3.38	18.45	6.76	4.58