Barcode recognition refers to reading the item information onto the barcode through a specific scanning device, and then processing the read information through the information processing device to achieve rapid positioning, accurate identification, automatic transmission and other functions of the item. The barcode recognition system mainly includes hardware equipment and software services such as barcode reading devices, wireless barcode scanners, and smart printers. The basic functions of the barcode recognition system include: barcode recognition, information exchange and information transfer 6 parts. It is closely combined with computer information processing technology and combined with the Internet of Things, sensor technology, and information processing technology. Through the combination of barcode recognition technology and computer information processing technology, activities such as intelligent transportation, automatic vending, logistics distribution, sales terminal management, product traceability, commodity and inventory management, product cost management, and commodity price management can be carried out. At the same time, the wireless barcode scanning device cooperates with the wireless RFID tag to perform real-time and rapid identification, automatic recording and automatic transmission of information on the product.
1. Barcode recognition technology
Barcode recognition technology is the most widely used coding technology in computer systems. It has good applicability to barcodes, commodity codes and organization codes of various commodities, and can meet the requirements of different types of information in various industries. storage and exchange requirements. Currently used in the market is mainly text coding and digital coding technology. Text encoding is to express the meaning of characters by embedding a small number of symbol codes between characters. The digital code is composed of multiple lines of letters, which can show the structural form of Chinese characters. Barcode recognition software developed in recent years can also use these technologies. Pay attention to the following points when scanning barcodes on objects: first, you cannot use multiple barcodes on a piece of paper, but scan two barcodes at the same time within the scanning area of ​​the scanner; secondly, you cannot directly insert the barcode into the card reader Third, avoid scanning with other items together, otherwise it will easily cause confusion; finally, you must avoid replacing multiple codes with each other, otherwise it will easily cause data loss or identification errors.
1. The software system
first preprocesses the barcode, and then converts the information encoded by the barcode into a set of data. The format can be in various forms such as strings, icons, symbols, etc., or in various forms such as codes and characters. For the reading of various barcodes, due to the different readers, their functions will also vary. Currently on the market for barcode recognitionThere are three kinds of mainstream software: general-purpose and embedded barcode recognition software. General-purpose barcode recognition software such as Terrafugia has been applied to industries such as food, tobacco, and medicine, but their requirements for certain specific performances are not high enough. Generally, they can only support the reading of smaller barcodes. Their functions and The performance is generally limited, and it is slightly lacking compared with general-purpose barcode recognition software. Embedded barcode recognition software such as Waymo and Agilent Block. Among them, the Waymo series embedded barcode recognition software realizes functions such as multi-function input processing and automatic image conversion by adding a dedicated reader-writer on the scanning device, making the embedded barcode recognition software in performance has a great advantage.
2. Automatic identification technology
Automatic identification is a system engineering, which involves a wide range of fields. At present, the most researched in this aspect is the principle and key technology of automatic identification. Automatic identification is the process of combining various information processing with computer technology. The hardware and software of the computer are based on mathematics, so the computer can accurately identify and store various barcode sequence information and the symbolic value represented. These characteristics are called algorithms. It mainly includes technologies such as sequence data processing, coding algorithm and data transmission strategy. Usually, devices used for automatic identification have their own unique coding rules and identification methods. The procedure for automatic identification of barcodes is as follows: firstly, the sequence analysis of the barcode is carried out, that is, basic data such as the basic information of the barcode, coding rules, coder rules, and recognition algorithms for different coding methods are processed and stored in the system (if any), and then The recognition operation is performed automatically by the system.