Two-dimensional code is also called two-dimensional bar code, and the common two-dimensional code is QR code, which means rapid response. It is a very popular coding method in mobile devices in recent years, which can store more information and represent more data types than traditional bar codes.
2-dimensional bar code is a kind of black-and-white figure which is distributed on a plane (two-dimensional direction) according to certain rules and records data symbol information. In coding, the concepts of "0" and "1" bit streams, which constitute the internal logic foundation of the computer, are skillfully used, and several geometric figures corresponding to binary are used to represent the numerical information of characters, which can be automatically read by image input equipment or photoelectric scanning equipment to realize the automatic processing of information: it has some characteristics of barcode technology: each code system has its own specific character set; Each character occupies a certain width; It has certain verification function. At the same time, it also has the function of automatically identifying different line information and processing graphics rotation change points.
2065438+On August 3, 2006, the Payment and Clearing Association issued the Code for Barcode Payment Business (Draft for Comment) to payment institutions, which clearly pointed out the security standards that payment institutions need to follow in developing barcode business. This is the first time that the central bank officially recognized the status of QR code payment after 20 14 stopped QR code payment.
The research on QR code technology in China began at 1993. China Article Coding Center has conducted translation and tracking research on several commonly used technical specifications of two-dimensional codes, such as PDF4 17, QRCCode, Data Matrix, Maxi Code, Code 49, Code 16K and Code One. With the continuous improvement of China's market economy and the rapid development of information technology, the demand for QR code, a new technology, is increasing in China. With the strong support of the former State Bureau of Quality and Technical Supervision and the relevant state departments, China Article Coding Center has continuously deepened the research on QR code technology. On the basis of digesting relevant foreign technical data, two national standards of two-dimensional code are formulated: two-dimensional code grid matrix code (SJ/T 1 1349-2006) and two-dimensional code compact matrix code (SJ/T 1 1350-2006), which greatly promotes the development of the two-dimensional code.