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you are probably familiar with the black and white square shaped barcodes you might have seen them at billing desks product packagings or even on tent cards and restaurants these are called qr codes they connect the offline media with online content and you are wondering how do these qr codes work well first you need to think of a qr code as a language that mobile devices and scanners can read but humans canamp;#39;t just as every language has some letters or words to form a sentence a qr code has elements and this video explains all the elements of a qr code and how they contribute to its functionality first data modules they are the black and white blocks of a qr code they store all the information which is shown to the end users the positioning of data bits begins from the bottom right corner of the matrix it moves upward in a two module wide column and switches direction on docHubing the top this makes the rows and columns of the qr code second eyes or the finder patterns they are
