The main function of machine vision detection, positioning and measurement. Machine vision system relative to the artificial or traditional mechanical means, with speed, high precision, high accuracy and a series of advantages. The development of industrial modernization, machine vision has been widely used in various fields, for enterprises and users to provide better product quality and perfect solution. At present, the application of machine vision mainly has the detection and the robot vision two aspects: 1. Detection: Can be divided into high-precision quantitative detection (such as photomicrography of the cell classification, the size of the mechanical components and position measurement) and qualitative or semi-quantitative test (such as product appearance inspection, assembly line Component identification positioning, defect detection and assembly integrity testing). 2. Robot vision: Used to guide the robots in a wide range of operations and actions, such as picking workpieces from a messy pile of workpieces sent from a hopper and placing them on a conveyor belt or other equipment in a certain orientation (ie hopper picking problem) . As for small-scale operations and actions, it is also necessary to use tactile sensing technology. Abroad, the popularity of machine vision applications mainly in the semiconductor and electronics industries, of which about 40% -50% are concentrated in the semiconductor industry. Specific such as PCB printed circuit: all types of production of printed circuit board assembly technology, equipment; single, double-sided, multilayer circuit boards, CCL and the required materials and accessories; auxiliary facilities and supplies, ink, medicine, pharmaceuticals, accessories; Packaging technology and equipment; screen printing equipment and screen surrounding materials. SMT surface mount: SMT process and equipment, welding equipment, testing equipment, repair equipment and a variety of auxiliary tools and accessories, SMT materials, patches, adhesives, flux, solder and anti-oxidation oil, solder paste, Reflow machines, wave soldering machines and automated production line equipment. Electronic production and processing equipment: electronic components manufacturing equipment, semiconductor and integrated circuit manufacturing equipment, components molding equipment, electronic mold. The machine vision system has also been widely used in all aspects of quality inspection, and its products occupy a pivotal position in the application. In addition, machine vision is used in a variety of other areas. In the industrial area for IC size measurement, that is, measuring the length and pitch of each pin IC. IC pin is a more fragile parts, in the production and transmission process, will be due to accidental operation resulting bending, damage, broken and other issues. In the field of industrial applications, there are mainly industries such as pharmaceuticals, packaging, electronics, automobile manufacturing, semiconductors, textiles, tobacco, transportation and logistics. The replacement of labor with machine vision technology can provide production efficiency and product quality. For example, in the logistics industry, machine vision technology can be used for sorting and sorting of courier services. Currently, most courier companies do not perform manual sorting and reduce the damage rate of items, which can improve the sorting efficiency and reduce manual labor.