Some articles on symbol, qr symbol:
... information records two things the error correction level and the mask pattern used for the symbol ... are defined on a grid that is repeated as necessary to cover the whole symbol ... information is protected from errors with a BCH code, and two complete copies are included in each QR symbol ...
Famous quotes containing the word symbol:
“Every natural fact is a symbol of some spiritual fact. Every appearance in nature corresponds to some state of the mind, and that state of the mind can only be described by presenting that natural appearance as its picture.”
—Ralph Waldo Emerson (18031882)