Machine vision light source system capable of automatically switching light source forms and dimming method

The invention discloses a machine vision light source system capable of automatically switching light source forms and a dimming method, the light source system comprises an industrial camera, a detection workpiece, a switchable light source and an industrial personal computer, and the industrial camera is controlled by the industrial personal computer and transmits image information of the detection workpiece to the industrial personal computer; the detection workpiece is arranged on the transparent conveyor belt; the switchable light source can be directly controlled by an industrial personal computer, different light source combinations and brightness can be switched, and the switchable light source comprises four backlight light sources, namely a low-angle strip-shaped light source vertical irradiation annular light source and a high-angle diffuse reflection annular light source. The industrial personal computer can make decisions by detecting workpiece images, and then controls the switchable light sourc