Related knowledge

The QR code is also called QR Code. QR stands for Quick Response. It is a very popular encoding method on mobile devices in recent years. It can store more information and represent more data types than the traditional Bar Code barcode.

2-dimensional bar code/QR code is a black-and-white patterned graphic that is distributed in a certain pattern on a plane (in the two-dimensional direction) using a specific geometric shape to record data symbol information; In code compilation, it ingeniously utilizes the concept of the "0" and "1" bit streams that form the logical basis within a computer, using several geometric shapes corresponding to binary to represent text and numerical information. It can be automatically recognized through image input devices or photoelectric scanning devices to achieve automatic information processing. It has some commonalities of barcode technology: each code system has its specific character set; each character occupies a certain width; it has a certain verification function, etc. At the same time, it also has the function of automatically recognizing information in different rows and processing rotational changes of graphics.