Standard QR code creation tool

QR code principle

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

2-dimensional bar code is a black and white graphic that records data symbol information using certain geometric figures distributed on a plane (in a two-dimensional direction) according to certain rules;

In coding, the concept of "0" and "1" bit streams, which form the basis of computer internal logic, is cleverly used, and several geometric shapes corresponding to binary are used to represent text numerical information, through image input equipment or photoelectric scanning equipment. Automatic reading to achieve automatic information processing:

It has some common features of barcode technology: each code system has its own specific character set; each character occupies a certain width; it has certain verification functions, etc. At the same time, it also has the function of automatically identifying different lines of information and processing graphics rotation change points. On August 3, 2016, the Payment and Clearing Association issued the "Barcode Payment Business Specifications" (draft for comments) to payment institutions. The draft clearly pointed out the security standards that payment institutions need to follow when conducting barcode services.
This is the first time the central bank has officially recognized the status of QR code payment since it stopped QR code payment in 2014.

Data representation method

Dark modules represent binary "1" and light modules represent binary "0".

Error correction ability

• level L : Can correct approximately 7% of data codewords
• level M : Can correct approximately 15% of data codewords
• level Q : Can correct approximately 25% of data codewords
• level H : Approximately 30% of data codewords can be corrected