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Interesting notes about QR codes

Doing some research while building some stuff for our store and I stumbled upon a couple of different things you can do to "enhance" QR codes.

Image Overlay

You can overlay an image on your QR code directly. To make this work can take a bit of trial and error, but to make this work, build your QR code with the maximum amount of ECC (error correcting code). Then, just slap an image down over the QR code and you are good to go. Like this: