Kent Brewster on Twitter: "Empty QR codes. All version 4, error correction level M. No mask, then masks 1 through 8. http://t.co/MQEXtMSonQ"
![MMA 2015] QR Code Recovery – Robert Xiao](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7a/QR_Code_Structure_Example.svg/1280px-QR_Code_Structure_Example.svg.png "MMA 2015] QR Code Recovery – Robert Xiao")
MMA 2015] QR Code Recovery – Robert Xiao
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