Machine vision means the machine with vision function, which facilitates the inspection, judgment, recognition, measurement and positioning, etc. Machine vision can help improve the production efficiency and automation as well as intelligent. Typically, machine vision system is comprised of light source, shot, camera, image processing hardware and software and EU (execution unit). Machine vision combines the technologies in optics, mechanical engineering, electronic engineering and computer hardware and software, which covers the field of image processing, pattern recognition, AI, opto-mechatronics, etc. In recent years, the rapid development of the image processing and AI has greatly promoted by machine vision.