what are QR codes and how does my phone camera associate them with a link or URL
In: 103
They are pretty much visual binary code. The black/white squares are 1s and 0s to encode pretty much any data you like. Then there is a part that helps to find the alignment (so it still works when flipped) and the data is slightly redundant (so you can block part of the QR Code and still read it).
Your phone has a program that knows how exactly the bits are to be read, and then interprets that binary number as a series of ASCII characters that form the link.
A bit more detailed: the phone knows wich order to read the squares. It starts and reads Black/Black/White/Black, transforms that to 1101, wich is 13 in decimal, and could be the letter N (made up example)
Latest Answers