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by CalebJohn
1115 days ago
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It is, the QR code spec details a few specific masks that are available. The one which produces the best QR code is chosen (best in this case means most clear/easiest for a scanner to read. So, no large blocks of white or black). Wikipedia has a pretty good visual of this.
https://en.m.wikipedia.org/wiki/QR_code#Encoding |
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