Fig. 20

Bolt detection examples in two structural regions: (a) Hanger region original image; (b) Hanger region detection result; (c) Stiffening girder original image; (d) Stiffening girder detection result.

Bolt detection examples in two structural regions: (a) Hanger region original image; (b) Hanger region detection result; (c) Stiffening girder original image; (d) Stiffening girder detection result.