QR Codes with Embedded Images

Inspired by this Hack-A-Day article, I  created my own QR code (Quick Response code) with embedded image for my blog.  Because these codes use the Reed–Solomon error correction algorithm, a percentage of the code can purposefully be obscured and the correct data will still be generated when the image is scanned. The article is worth reading even if you don't plan to make QR codes as it explains how the alpha-numeric data is stored.