Automatic recognition technology is a highly automatic data acquisition technology based on the development of computer, light, machine, electricity, communication and so on. It automatically obtains the relevant information of the identified object by using a certain recognition device, and provides it to the background processing system to complete the related subsequent processing technology. It can help people to collect and input massive data quickly and accurately, and has been widely used in transportation, warehousing, distribution and so on. After nearly 30 years of development, automatic recognition technology has been developed into bar code recognition technology, smart card recognition technology, optical character recognition technology, radio frequency recognition. The comprehensive technology composed of special technology, biometric technology and so on is developing in the direction of integrated application.

Bar code recognition technology is the most widely used automatic recognition technology at present. It uses photoelectric scanning equipment to read bar code symbols, so as to realize automatic information input. Bar code is a set of bars arranged according to specific rules, empty and corresponding characters to represent a certain number of symbols. The composition rules of bar code symbols are different in different code systems. Radio frequency identification (RFID) technology is a modern automatic identification technology developed in recent years. It is based on the sense of utilization.

Biometric identification technology is a kind of technology which uses human physiological or behavioral characteristics to identify. Biological characteristics include hand shape, fingerprint, face shape, iris, retinal, pulse, auricle and so on. Behavior characteristics include signature, sound and so on. Because of the non-replicable characteristics of human body, the security of this technique is much higher than that of the traditional authentication mechanism.