Oh I like this! Stitching a QR code, c'est génial!
What's a QR code? Wikipedia has the answer!
"A QR Code, also known as a Box Code, is a matrix barcode (or two-dimensional code), readable by QR scanners, mobile phones with a camera, and smartphones. The code consists of black modules arranged in a square pattern on white background. The information encoded can be text, URL or other data."
PS. Check this post for a link to a QR code generator.