(1) high resolution, the acquisition system can have 10bit, 12bit, 16bit and other grayscale. Currently, there are 8K planar array cameras, which can detect very small errors through various optical lenses of different levels.(2) it is highly adaptable to environmental temperature and humidity, and can operate in some dangerous places. In addition, protective devices can be added.(3) the visual system can detect the same product for a long time, and the error of each detection can be controlled to a certain extent.