This is exactly what http://OpenTHC.com/ http://OpenTHC.com/ does. I built it. QR is great and it scans faster than barcode and is more resilient to smudge (and

This is exactly what http://OpenTHC.com/ http://OpenTHC.com/ does. I built it. QR is great and it scans faster than barcode and is more resilient to smudge (and sun damage). You can open scans with zxing links on a webpage but you'll likely want an app - cause the performance will be better.