QR code


QR code (abbreviated from Quick Response Code) is a trademark for the matrix barcode type (or two-dimensional barcode) first designed for the second-car industry in Japan. A barcode is a machine readable optical label that contains information about the product to which it is attached. A QR code uses four standardized encoding modes (numeric, alphanumeric, byte / binary and kanji to efficiently store data; can also be used for the extension.

The rapid response system (QR code) has become popular outside the automotive industry due to its fast readability and greater storage capacity compared to with standard UPC barcodes. Applications include product tracking, product identification, time tracking, document management, marketing.

The QR code consists of black squares arranged in a square grid on a white background, which can be read using a visualization device, such as a camera, and processed using reed–Solomon error correction until the image can be appropriately interpreted. The necessary data is then retrieved from the templates that are present in both the horizontal and the vertical components of the image.