Explain to me how QR codes work

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I understand the code itself is a different make up of black/white grids to get your phone to recognize a linked site. But at some point won’t we completely run out of possible image combinations making them obsolete or is it something that regenerates a new site to QR connection? (On mushrooms so I might not have asked this very well lmao)

Basically will we run out of QR codes and if not how is there an endless supply?

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Anonymous 0 Comments

Think about a UPC code, those stripes you see on packages at the store. How those work is the thickness of the stripe encodes information, black lines are 1 and white lines are 0, so the computer scans it and sees something like 0001010100010101010110111010100101. That’s just a number, and computers are good at taking numbers and looking on a list to see what the number is for.

The QR code is like a two-dimensional version of that same thing. Because it’s 2D, they can pack more 1s and 0s into the same space, so it can include letters and other stuff instead of just numbers, which is why it’s used instead of a really long bar code.

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