27 Facts About QR code

QR code is a type of matrix barcode (or two-dimensional barcode) invented in 1994 by the Japanese automotive company Denso Wave.

QR code system was invented in 1994 by Masahiro Hara from the Japanese company Denso Wave.

The QR code has become one of the most-used types of two-dimensional code.

Typically, a smartphone is used as a QR code scanner, displaying the code and converting it to some useful form.

QR code has become a focus of advertising strategy, since it provides a way to access a brand's website more quickly than by manually entering a URL.

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Examples of marketing include where a company's discounted and percent discount can be captured using a QR code decoder which is a mobile app, or storing a company's information such as address and related information alongside its alpha-numeric text data as can be seen in Yellow Pages directories.

In June 2011, The Royal Dutch Mint issued the world's first official coin with a QR code to celebrate the centenary of its current building and premises.

When scanned with an internet-enabled mobile device, the QR code goes to a website which tells the centenary story of Nigeria.

In September 2016, the Reserve Bank of India launched the eponymously named Bharat QR, a common QR code jointly developed by all the four major card payment companies – National Payments Corporation of India that runs RuPay cards along with MasterCard, Visa and American Express.

In developing countries like China, India and Bangladesh QR code payment is a very popular and convenient method of making payments.

In November 2012, QR code payments were deployed on a larger scale in the Czech Republic when an open format for payment information exchange?–?a Short Payment Descriptor?–?was introduced and endorsed by the Czech Banking Association as the official local solution for QR payments.

Unlike the older, one-dimensional barcodes that were designed to be mechanically scanned by a narrow beam of light, a QR code is detected by a 2-dimensional digital image sensor and then digitally analyzed by a programmed processor.

The processor locates the three distinctive squares at the corners of the QR code image, using a smaller square near the fourth corner to normalize the image for size, orientation, and angle of viewing.

The small dots throughout the QR code are then converted to binary numbers and validated with an error-correcting algorithm.

The Reed–Solomon QR code uses one of 37 different polynomials over, with degrees ranging from 7 to 68, depending on how many error correction bytes the QR code adds.

The QR code blocks are then interleaved together, making it less likely that localized damage to a QR symbol will overwhelm the capacity of any single block.

The total length of the QR code is 15 bits, of which 5 are data bits and 10 are extra bits for error correction.

Each block is a Reed Solomon QR code (shortened to (35, 13) QR code), which can correct up to 11 byte errors in a single burst, containing 13 data bytes and 22 "parity" bytes appended to the data bytes.

Model 1 QR code is an older version of the specification.

Micro QR code is a smaller version of the QR code standard for applications where symbol size is limited.

Secure Quick Response code is a QR code that contains a "private data" segment after the terminator instead of the specified filler bytes "ec 11".

The HCC2D QR code specification is described in details in Querini et al.

In particular, during QR code reading only the brightness information is taken into account, while HCC2D codes have to cope with chromatic distortions during the decoding phase.

JAB QR code is a color 2D matrix symbology made of color squares arranged in either square or rectangle grids.

Text QR Code itself is a registered trademark and wordmark of Denso Wave Incorporated.

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The U S Trademark for the term QR Code is Trademark 2435991 and was filed on 29 September 1998 with an amended registration date of 13 March 2001, assigned to Denso Corporation.

In Russia, a malicious QR code caused phones that scanned it to send premium texts at a fee of $6 each.