I’ve really taken to QR codes recently, so I’ve been tinkering with customizing them.
The tiny logo customisation you may have seen in branded QR codes is really easy to achieve with a little trial and error, so I decided to try something a little more tricky:
This is based on the idea that QR readers are colour blind, so what they look for is high contrast. This allows you to create a simple four-tone image, in this case black and red contrasting white and grey.
I did this using GIMP. My tutorial for how to do this is available on youtube:
Because of the pretty impressive error correction, you can pull off some other quite interesting hacks, too, which I might show next week.
If you are using QR codes in an interesting way in the classroom, please let me know in the comments!