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An Artisanal QR Code [1] shows how to compute the checksum by hand using arithmetic similar to a long division. There are actually two slightly different codes
by amenghra 3y ago
An Artisanal QR Code [1] shows how to compute the checksum by hand using arithmetic similar to a long division. There are actually two slightly different codes (Reed-Solomon and BCH) for different pieces of information.
[1] https://www.quaxio.com/an_artisanal_qr_code.html https://www.quaxio.com/an_artisanal_qr_code.html