Vey interesting and informative post about a different way to put pictures in QR codes. Instead of scribbling on redundant pieces and relying on error correction to preserve the meaning, the encoded values can be engineered to create the picture in a code with no inherent errors.
Here is an example:
Check out the web site for creating these type of QR codes: http://research.swtch.com/qr/draw

Source: http://research.swtch.com/qart