Recently [mit41301] wondered about increasing the data capacity of QR codes, and was able to successfully triple the number of bits using color. He chose the new rectangular micro QR code (rMQR) st… ...

Most QR codes do the same thing – when a smartphone scans them with its camera, they trigger that phone's web browser to navigate to a given website. In the near future, however, they may be ...

We’re no stranger to QR codes here at Hack a Day, and it’s very possible the only thing that could be stopping [mikey]’s QR code from being read by a phone is the contrast of the image.