How Do QR Codes Work?

QR codes, short for Quick Response codes, are two-dimensional barcodes that can be scanned and decoded using a smartphone camera or a reader.


Similar to a barcode, QR codes pass along information to the reader in the form of a URL or snippet of code using a pattern of light and dark squares. 


Yet, a standard code can encode more than 23,000 bits of information, or about 3,000 characters, whereas a standard UPC barcode can only store 33 bits of information in the form of a number.


Every person on earth could give a different QR code to every image, link, and item ever made without ever running out due to its intricacy.


It also means that there are virtually infinite conceivable permutations.


When you scan a QR code using the camera on your smartphone, the camera captures the image of the code and converts it into digital information that can be read by your device. 


The information stored in the code is then displayed on your device's screen, allowing you to access the encoded content.


When you aim your phone at a QR code, the three large squares serve as anchors to instruct the program on how to position the code and which colors are light and dark. 


The necessary information is located in the remaining little squares.


See more: https://barcodelive.org/will-we-run-out-of-qr-codes

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