How is information stored in and read from a QR code?

Question

How is information stored in and read from a QR code?

In: Technology

Answer 1

A QR code is an image that represents a binary code (black block = 1, white block = 0).

This binary code can represent text by associating each text character with a number. For example, in ASCII, the character ‘h’ is assigned the number 104, which is 1101000 in binary. So you’d have [black, black, white, black, white, white, white] in the QR code.

So then you can make the QR code represent a URL. A QR code that seems to be storing information is probably a URL pointing to a website that’s doing the work.