Fortune Telling Collection - Horoscope - What should I do if the QR code of Pig Xiao Pi is lost?
What should I do if the QR code of Pig Xiao Pi is lost?
QR code
? (1) Two-dimensional code is also called two-dimensional bar code. The common two-dimensional code is QR code, which stands for quick response. It is a super popular coding method on mobile devices in recent years. Compared with the traditional bar code, it can store more information and represent more data types.
(2) Two-dimensional barcode is a black-and-white figure distributed on a plane (two-dimensional direction) according to certain rules, which records data symbol information; The concepts of "0" and "1" bit streams, which constitute the internal logic foundation of computers, are skillfully used in coding.
Second, the development of two-dimensional code
? (1) The numerical information of characters is represented by several geometric figures corresponding to binary, and the information is automatically read by image input equipment or photoelectric scanning equipment. It has some commonalities of barcode technology: each code system has its specific character set; Each character occupies a certain width; It has certain verification function.
(2) At the same time, it also has the function of automatically identifying different line information and processing the rotation change points of graphics. 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.
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