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Scan QR Codes in Real-Time with Raspberry Pi
Quick-reference (QR) codes are similar to barcodes, as they are able to encode data that is represented by black and white squares. But instead of using a laser, a camera differentiates between the spaces and then sends that information to be processed. They are comprised of several large squares that help to align and position the edges of the QR code, formatting columns, a version number, and finally, the data itself.