Oct 24 2007
I promise this will be the last post for a while to include a QR-Code. If you don’t know what a QR-Code is, go read about it on wikipedia. There are several QR-Code readers out there but I have personally chosen to go with the Kaywa Reader. I also use the Kaywa QR-Code generator.
The reason for this post was to play with an idea I came up with after reading the Wikipedia article on QR-Codes. One of the images they show is of an picture encoded into the code. Whilst I haven’t yet been able to figure out how they encoded the image into the code I have made another discovery. It turns out that QR-Codes contain a lot of redundancy. It is possible to loose up to 30% of the code and still be able to read its content.
I’ve found that it is possible to paste an image over the top of the QR-Code. My experiments so far indicate seem to indicate the image needs to cover less than 30%. I haven’t had to time to find out how the QR-Codes are structured. It may be possible in re-structure the data so that more of it can be lost to the embedded image.