Automatic identification technology can be divided into:
1. Barcode recognition technology
Bar code is composed of a group of bars, blanks and numerical symbols, arranged according to certain coding rules, to represent certain characters, numbers and symbols and other information. There are many types of bar codes, which can be roughly divided into one-dimensional bar codes and two-dimensional bar codes. Barcode recognition is the identification of infrared or visible light, infrared or visible light emitted by the scanner irradiates the barcode mark, the dark \"bar\" absorbs light, the light \"empty\" reflects the light back to the scanner, the scanner converts the light reflection signal into electronic pulses, and then the decoder converts the electronic pulses into data, and finally passes to the background.
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2. Magnetic card identification technology
Magnetic strips record information by changing the polarity of the magnetic fields (such as S-N and N-S), and a decoder can read the magnetic changes and convert them back into letters or numbers for processing by a computer. The magnetic card is characterized by read-write data, that is, the ability to change data on the spot.
3.IC card identification technology
IC card is an electronic automatic data identification card. According to whether it has a microprocessor, IC cards can be divided into memory cards and smart cards. The memory card contains only a memory chip without a microprocessor, and the general phone IC card belongs to this category. A large integrated circuit with memory and a microprocessor chip is embedded in a plastic substrate to make a smart card, which is often referred to in IC cards in banks.
4. Radio frequency identification technology
Radio frequency identification (RFID) is an automatic identification technology that transmits data through radio waves. It uses radio frequency signal to realize contactless information transmission and achieve the purpose of automatic identification of target objects. RFID technology can complete the collection and transmission of information without manual intervention, and is known as one of the ten important technologies in the 21st century.
5. Biometrics
The so-called biometrics technology is to use the inherent physiological characteristics of the human body (such as fingerprints, finger veins, face, iris, etc.) and behavioral characteristics (such as handwriting, voice, gait, etc.) to identify individuals through the close combination of computers and high-tech means such as optics, acoustics, biosensors and biostatistics principles
6. Image recognition technology
It refers to the technology of object recognition on images to identify various targets and objects of different modes.
7. Optical character recognition technology
OCR (Optical character recognition) is the process by which an electronic device (such as a scanner or digital camera) examines characters printed on paper, determines their shape by detecting dark and light patterns, and then translates the shape into computer text using character recognition methods.
Automatic identification technology includes:
1, bar code identification technology;
2, biometric technology; (1) Voice recognition technology (2) Face recognition technology (3) Fingerprint recognition technology (3) Image recognition technology; 4, magnetic card identification technology; 5, IC card identification technology; 6, optical character recognition technology; 7, radio frequency identification technology. Automatic identification technology introduction: Automatic identification technology is the application of a certain identification device, through the proximity activity between the identified items and the identification device, automatically obtain the relevant information of the identified items, and provide to the background computer processing system to complete the relevant follow-up processing technology. Automatic identification technology integrates computer, optical, electrical, communication and network technologies, and combines with the Internet, mobile communication and other technologies to realize the tracking and information sharing of items on a global scale, so as to give objects intelligence, and realize the communication and dialogue between people and objects and objects.
Automatic identification technology includes:
? Bar code technology. Mainly used for commodity information recording, industry. Books and bills and other automation management field, logistics and other management field.
? Radio frequency identification technology. Applied to highway automatic toll collection and traffic management, access control security, RFID card charging.
? Biometrics. Used in the field of defense and a few large enterprise conference centers or places with high confidentiality requirements? Speech recognition technology. ? Image recognition technology.. ? Magnetic recognition technology. Often used for magnetic cards