This QR code (called ” quick response ” code in short ) is a type of barcode in which a matrix of dots is available. They can be scanned through a QR scanner or a smartphone that has a built-in camera. Once scanned, the  software in the device converts those dots that are in the code into numbers or a string of characters.

For example, upon scanning a QR Code, it may be that the URL of a website opens in your phone’s browser .

All QR codes are square shaped and have three square outlines in the bottom-left, top-left, and top-right corners. These square outlines define the orientation of the code. These dots which are rich within the QR code include format and version information as well as content. QR codes also have some amount of error correction, which is defined as L, M, Q, or H. A small amount of error correction (L) allows the QR code to hold more content, while higher error correction (H) makes the code easier to scan.

QR codes have two of the most important benefits compared to traditional UPCs – these barcodes are commonly used in retail packaging.

The first is that since QR codes are two-dimensional, it contains significantly more data than a one-dimensional UPC. Where a UPC may contain mehjud, up to 25 different characters, while a 33 × 33 (version 4) QR code may contain around 640 bits or 114 alphanumeric characters. A 177 × 177 (version 40) QR code can store around 23,648 bits or 4,296 characters.

Another advantage is the QR codes , that they can be scanned even from a screen. Standard UPC scanners use a laser to scan barcodes, which means that they cannot typically scan a UPC from a screen (such as a smartphone). QR scanners, on the other hand, are designed to capture 2D images that are printed in paper or displayed on a screen. This makes it possible to use the QR Code on your smartphone on a boarding pass, at the airport or at the event of a ticket.

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