Defect detection method and device for airplane cup head rivet

The invention relates to the technical field of computer vision, and discloses a defect detection method and device for airplane cup head rivets, and the method comprises the steps: obtaining first image information of a plurality of riveted airplane cup head rivets; identifying a head damaged part pixel communication region of each airplane half-round head rivet in the first image information, and calculating to obtain the area of the head damaged part pixel communication region of each airplane half-round head rivet; and according to the area of the pixel communication region of the damaged part of the head and the relation between the damaged area of the head of the half-round head rivet and the deformation quantity, detecting whether the half-round head rivet of each airplane has defects or not. According to the method, the compression amount detection of the half-round head rivet is converted into calculation of the area of the pixel communication region of the damaged part of the head of the airplane ha