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  2. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; the pattern of position detection was found and determined by applying the least-used ratio (1:1:3:1:1) in black ...

  3. Rectangular Micro QR Code - Wikipedia

    en.wikipedia.org/wiki/Rectangular_Micro_QR_Code

    Rectangular Micro QR Code (rMQR Code) version R17x43. Rectangular Micro QR Code (also known as rMQR Code) is two-dimensional (2D) matrix barcode invented and standardized in 2022 [1] by Denso Wave as ISO/IEC 23941. [2] rMQR Code is designed as a rectangular variation of QR code and has the same parameters and applications as original QR code.

  4. MeCard (QR code) - Wikipedia

    en.wikipedia.org/wiki/MeCard_(QR_code)

    MeCard (QR code) MeCard is a data file similar to vCard but used by NTT DoCoMo in Japan in QR code format for use with Cellular Phones. It is largely compatible with most QR-readers for smartphones. It is an easy way to share a contact with the most used fields.

  5. QR code payment - Wikipedia

    en.wikipedia.org/wiki/QR_code_payment

    A QR code payment is a mobile payment method where payment is performed by scanning a QR code from a mobile app. [1] This is an alternative to doing electronic funds transfer at point of sale using a payment terminal. [2] This avoids a lot of the infrastructure traditionally associated with electronic payments such as payment cards, payment ...

  6. Barcode - Wikipedia

    en.wikipedia.org/wiki/Barcode

    A UPC-A barcode. A barcode or bar code is a method of representing data in a visual, machine-readable form. Initially, barcodes represented data by varying the widths, spacings and sizes of parallel lines. These barcodes, now commonly referred to as linear or one-dimensional (1D), can be scanned by special optical scanners, called barcode ...

  7. Wikipedia:WikiProject QRpedia/user guide - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:WikiProject...

    Paste the URL into the box. (The code will automatically generate.) Edit. Click on the QR code image and save it. Import the QR code image into a word processor programme or graphics package. (Optionally) Add text labels. Print. Print the code a minimum of 1 inch (2.5 cm) across, where possible 2 inches (5 cm).

  8. Masahiro Hara - Wikipedia

    en.wikipedia.org/wiki/Masahiro_Hara

    The code was introduced in 1994. In 2021, QR codes were being used to book and track COVID-19 tests and contact tracing. Hara has stated that he would like to develop QR codes for additional medical purposes, including imaging such as x-rays or electrocardiogram data. Hara still works for Denso as of 2022.

  9. QR algorithm - Wikipedia

    en.wikipedia.org/wiki/QR_algorithm

    QR algorithm. In numerical linear algebra, the QR algorithm or QR iteration is an eigenvalue algorithm: that is, a procedure to calculate the eigenvalues and eigenvectors of a matrix. The QR algorithm was developed in the late 1950s by John G. F. Francis and by Vera N. Kublanovskaya, working independently.

  10. Aztec Code - Wikipedia

    en.wikipedia.org/wiki/Aztec_Code

    The Aztec Code is a matrix code invented by Andrew Longacre, Jr. and Robert Hussey in 1995. [1] The code was published by AIM, Inc. in 1997. Although the Aztec Code was patented, that patent was officially made public domain. [2] The Aztec Code is also published as ISO/IEC 24778:2008 standard.

  11. Wikipedia:GLAM/Derby/QR code experiment - Wikipedia

    en.wikipedia.org/.../Derby/QR_code_experiment

    QR codes are the latest version of bar codes - they look like random pixels arranged in a design typically about an inch square (see top right). If you have a smart (ie cost over 100 pounds) phone then you can point the camera at the code. The computer inside the phone decodes the picture into a web address. The phone then uses that web address ...

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