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 ...

The design of QR codes also make them well suited to 3D printing ... you’ll need to swap the filament color at the appropriate layer manually. With so many variables involved, you’ll also ...

The mystery of sudden appearance of QR codes on graves has been solved. A peculiar mystery involving the appearance of over 1,000 QR codes on gravestones in Munich, Germany has finally been solved.