What's a Qr Code Reader?

A QR code is a type of matrix barcode invented in 1994 by the Japanese automotive company Denso Wave. A barcode is a machine-readable optical label that contains information about the item to which it is attached.

What does a QR code reader do?

A QR reader can identify a standard QR code based on the three large squares outside the QR code. Once it has identified these three shapes, it knows that everything contained inside the square is a QR code. The QR reader then analyzes the QR code by breaking the whole thing down to a grid.

What is QR code and how does it work?

How Does A QR Code Work? Basically, a QR code works in the same way as a barcode at the supermarket. It is a machine-scannable image that can instantly be read using a Smartphone camera. Every QR code consists of a number of black squares and dots which represent certain pieces of information.