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Its purpose was to keep track of automotive parts manufactured by Denso, to replace several bar codes on each box, each of which had to be scanned separately, with the requirement of high capacity that is able to encode Kanji, Kana and alphanumerics together.

The initial design was influenced by the black and white pieces on a Go board, the position detection pattern was found using the least used ratio in black and white areas on printed matter can avoid misidentifying, which was 1:1:3:1:1. The QR code system was invented in 1994 under a team led by Masahiro Hara from the Japanese company Denso Wave. Applications include product tracking, item identification, time tracking, document management, and general marketing. The QR labelling system was applied beyond the automobile industry due to its fast readability and greater storage capacity compared to standard UPC barcodes.

The required data is then extracted from patterns that are present in both horizontal and vertical components of the image. Ī QR code consists of black squares arranged in a square grid on a white background, including some fiducial markers, which can be read by an imaging device such as a camera, and processed using Reed–Solomon error correction until the image can be appropriately interpreted. To efficiently store data, QR codes use four standardized modes of encoding (i) numeric, (ii) alphanumeric, (iii) byte or binary, and (iv) kanji. In practice, QR codes contain data for a locator, an identifier, and web tracking. A barcode is a machine-readable optical image that contains information specific to the labelled item. A QR code for the URL of the English Wikipedia Mobile main pageĪ QR code (short for ' quick-response code') is a type of two-dimensional matrix barcode, invented in 1994, by Japanese company Denso Wave for labelling automobile parts.

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