The greater the amount of data stored, the bigger the size. QR codes can hold up to 2953 bytes of data, 4296 alphanumeric characters, 7089 numeric characters, or 1817 Kanji characters. The ECL ...

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 QR code (short for Quick Response code) was invented in 1994 by Denso Wave, a former subsidiary of Toyota, as a means of efficiently tracking vehicles and parts during the manufacturing process.