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What does QR-Code mean ?


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A QR-Code (short for “Quick Response” code) is a type of barcode that contains a dot matrix. It can be scanned using a QR scanner or a smartphone with a built-in camera. After scanning, software on the device converts the dots in the code into numbers or a string of characters. For example, when users scan a QR-Code with their phone, a URL may open in their phone’s web browser.

All QR-Codes are square in shape and contain three square outlines in the lower left, upper left and upper right corners. These square outlines define the orientation of the code. The dots in QR-Code contain format and version information as well as the content itself. QR-Code s also contain a specific error correction level, defined as L, M, Q, or H. A low error correction (L) allows the QR-Code to contain more content, while a higher error correction (H) makes the code easier to scan.

Advantages and disadvantages of the QR-Codes

  • Because QR-Codes are two-dimensional, they can contain significantly more data than a one-dimensional UPC. While a UPC can contain up to 25 different characters, a 33x33 QR-Code can contain 640 bits or 114 alphanumeric characters.
  • Another advantage of QR-Codes is that they can be scanned via a screen. For example, you can use QR-Codes on your smartphone as a boarding pass at the airport or as a ticket for an event.
  • Not all mobile phones are equipped with a QR scanner, which makes it necessary to download external Apps.
  • Since QR scanners rely on good visibility, QR-Codes are not suitable for placing in dark places with poor visibility.

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