QR Code stands for "quick response", and it is a special matrix barcode that was developed and introduced to the public in 1994 by the Japanese company Denso-Wave.
There are also special programs that can decode a QR code and display what it represents. In simple terms, it is a 2D image consisting of squares arranged in a specific way, which allows for the encryption of information hidden in the QR code.
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What is a QR code[/caption]
A program that can read such images obtains a QR code by some method and, using a special algorithm, decodes the information encoded in the QR code. This is the main advantage of the QR code, namely - easy recognition by any device, including a simple mobile phone.
It is precisely because of this that the QR code has become widespread in trade and logistics.
However, the QR Code naturally has some limitations, namely:
- Numbers - 7089
- Numbers and Letters - 4296
- Binary code - 2953 bytes, that is, about 2953 characters in Windows-1251 encoding, or about 1450 in UTF-8 encoding
- Hieroglyphs - 1817
Programs for recognizing QR codes automatically identify the data format stored in the QR code. Thus, it is not uncommon to see a QR code on products. By scanning it, you can leave a review about the product, read information about it, find out where it was made and what its quality is.
In general, a QR code is a modern method of compactly storing data about a particular object. Thanks to the QR code, human life has become much easier!
Good luck!
