Anti-counterfeiting technology: barcode anti-counterfeiting

1. Principles of barcode technology
< : : (>Barcode anti-counterfeiting label technology is produced and developed in computer applications and practices and is widely used in commerce, postal services, library management, warehousing, industrial production process control, transportation, etc. An automatic identification technology in the field, with the advantages of fast input speed, high accuracy, low cost, strong reliability, etc., it occupies an important position in today's automatic identification technology.
< : : (> 2. Barcode The concept
< : : (> A barcode is a mark composed of a set of regularly arranged bars, spaces and corresponding characters. The bars refer to the parts with low reflectivity to light, and the spaces refer to the parts with high reflectivity to light. Part, these data composed of bars and spaces express certain information and can be read by specific equipment and converted into binary and decimal information compatible with computers. Usually for each item, its encoding is unique. For ordinary For one-dimensional barcodes, the corresponding relationship between the barcode and product information must be established through a database. When the barcode data is transmitted to the computer, the data is operated and processed by the application program on the computer. Therefore, ordinary one-dimensional barcodes It is only used as identification information during use, and its meaning is achieved by extracting the corresponding information from the database of the computer system.