We human beings through the naked eye to observe and understand the world, the machine perception of the world also needs to be equipped with a pair of "eyes", and the machine vision detection system is to use the machine instead of human eyes to carry out various measurements and judgments.

Machine vision is commonly known as the "eye" of the machine body. It is the visual organ of the machine perception world. Machine vision can perceive the world and interact with the outside world, so as to realize automation and intelligence.

Through machine vision, we can realize the following four basic functions, namely, identification, measurement, positioning and detection:

A. Image recognition. It mainly identifies the physical features of the object, including surface features such as shape, color, character and bar code.

B. Size measurement. By calibrating the acquired image pixel information into measurement units, the geometric size of the target object can be accurately calculated, which is mainly used in high-precision and complex morphometry.

C. Object location. It refers to the acquisition of the spatial position information of the target object, which can be divided into two-dimensional or three-dimensional information. It is mainly used to complete the auxiliary operation, which is often used to assist the assembly and picking of the robot.

D. Parts inspection. Is to detect the surface state of the target object, so as to determine whether the product has quality defects, such as parts appearance defects, contaminants attachment, functional defects, etc.

Therefore, as long as contains one of the above four problems can be tested.