What is a QR Code?

QR Code (ang. Quick Response Code)

QR Code (quick response) is an alphanumeric, two-dimensional barcode, matrix square graphic code developed by the

Japanese company Denso-Wave in 1994, allows encoding of much more information than one-dimensional codes - the same data

is encoded on an area equal to 10% of the area of a traditional linear barcode. Its most important features are:

QR codes are two-dimensional bar codes that store information within a pattern of black and white squares. The data

encoded in a QR code is typically limited to a few hundred alphanumeric characters, but may also include byte and binary

data. QR codes come in different models, such as Model 1, Model 2, and Micro QR Code, each of which have different

sizes, capacities, and error-correction capabilities.

Model 1 QR codes are the most common type of QR code. They are designed to store numeric and alphanumeric data, and can

be up to 7,089 characters in length. Model 1 QR codes can also be used to store binary data, such as images, audio, and

website URLs.

Model 2 QR codes are designed for larger data capacity than Model 1 codes. They are capable of storing up to 4,296

characters and support byte and binary data. Model 2 QR codes also include error-correction capabilities that can help

to improve reading accuracy.

Micro QR codes are the smallest type of QR code. They are designed to store up to 35 characters of numeric or

alphanumeric data. Micro QR codes have the lowest error-correction capability of all QR code models.

Micro QR Code are used on small surfaces and encodes a small amount of information (e.g. marking of small electronic parts).