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QR Codes Explained

Sep 06.2018Software

QR codes are used more frequently today to connect to websites and to allow access to certain contact information, mobile payments or airline and train tickets on your phone.

QR Codes Explained was reviewed by Razvan Iancu
The QR code system was invented in 1994 by the Japanese company Denso Wave. Its purpose was to track vehicles during manufacturing; it was designed to allow high-speed component scanning. QR codes are now used in a much broader context, including both commercial tracking applications and convenience-oriented applications aimed at mobile-phone users (termed mobile tagging).

QR codes may be used to display text to the user, to add a vCard contact to the users device, to open a Uniform Resource Identifier (URI), or to compose an email or text message. There are a great many QR code generators available as software or as online tools. The QR code has become one of the most-used types of two-dimensional code.

A QR code consists of black squares arranged in a square grid on a white background, which can be read by an imaging device such as a camera, and processed using ReedSolomon error correction until the image can be appropriately interpreted. The required data is then extracted from patterns that are present in both horizontal and vertical components of the image.