Visual detection method and detection device for concave-convex defects of object

The invention discloses a visual detection method and detection device for concave-convex defects of an object. The detection method comprises the following sequential steps: a ring light source comprising multiple light sources is arranged, and a to-be-detected object is made to be located in the center of the ring light source; a camera is arranged, and the view finding direction of a lens of the camera is made to be perpendicular to the irradiation direction of the light source; the ring light source is sequentially started at intervals, and once one light source is triggered to irradiate,the camera is triggered to take a picture; and the area of pixels in a concave-convex defect area of the object surface in the picture is counted. The detection device comprises the camera, the lightsources and a control box; and the control box is electrically connected with the camera and the multiple light sources. According to the visual detection method and detection device for the concave-convex defects of the objec