The QR Code is a matrix code placed in a square with a white
background made up of black modules.
The arrangement of these points defines the information contained in
Numeric, alphanumeric and binary characters can be stored
The advantages of the QR Code?
The QR Code can contain up to 7089 numeric characters, 4296
alphanumeric characters which is much higher than what its ancestor could
have contained in the barcode with 10 to 13 storage characters.
But what is the point of storing so much data?
Just scan the QR Code given above for example to see it: indeed, it
is a direct link to the portal www.supinfo.com.
QR Codes can contain web addresses, wifi access, train tickets or
The QR Code is easy and fast to use and to create. To read a QR
Code, it is enough to have a smartphone with a reading application and to
aim the code from the mobile. In an iPhone, a QR Code reader is integrated
into the camera, no additional application is required.
As far as the creation of QR Code is concerned, a large number of
websites / mobile applications allow to generate some for free.
A pen stroke on a barcode compromised the barcode, making it
unusable. Using the "Reed-Solomon" system used for error correction, the
QR Code allows its creator to choose a security level to ensure code
reading even in the event of partial code loss. The security levels range
from level L to level H via M and Q and allow to recover the data present
in a QR Code having up to 30% code lost for its maximum level and 7% for
its lowest level. Translated with www.DeepL.com/Translator
The QR Code has its place in today's world, a connected world where
we all have a smartphone and use technology to simplify and optimize
Whether it is its storage capacity, its use and its security, the QR
Code has everything for it.
It is increasingly used by both the general public and companies:
Nowadays, payments are made via QR Code and it is also widely used for