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QRCODE QR code
QR Code (English: Quick Response Code; known as Quick Response Matrix Code) is a type of two-dimensional code, invented in 1994 by Masahiro Hara of the Japanese automotive component manufacturer Denso.QR comes from the abbreviation Quick Response, which means quick response, because the inventor wanted the QR code to be able to decode its content quickly.QR codes use QR codes use four standardized coding patterns (numeric, alphanumeric, byte (binary), and Japanese (Shift_JIS)) to store data.Originally developed in Japan, QR codes are now widely used around the world for cell phone reading operations.QR codes offer fast readability and greater storage capacity than regular bar codes, and they do not require a straight line to the scanner when scanned like 1D barcodes, and can be used in applications such as Applications include product tracking, item identification, document management, inventory marketing and more.
Fault Tolerance
QR codes are error tolerant, even if the graphics are damaged, they can still be read, up to 30% of the damaged area. For this reason, QR codes are also widely used on shipping boxes.
Relatively speaking, the larger the QR code graphic area, the higher the fault tolerance, so a compromise of 15% fault tolerance (M rating) is generally used.
Error Correction Capacity | | L level | Can correct 7% of the characters | | M Grade | Corrects 15% of codes | | Q rating | Corrects 25% of the code | | H Grade | Corrects 30% of the characters |
A higher fault tolerance level means that the QR code can be scanned successfully even if it suffers from a greater degree of damage or contamination, but this may also lead to an increase in the size of the generated QR code. It can also be understood that if the QR code will not be printed for display, it is actually sufficient to use the normal fault tolerance at all.
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发表于 2024-6-22 14:57:24
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