QR codes work even when broken because they have extra pieces that help them still be read correctly.
Imagine you're writing a message in a notebook, and you write it so clearly that even if some letters get smudged or torn off, someone can still figure out what the whole message says. That’s kind of how QR codes work, they have redundancy, which means they repeat parts of the information inside them.
Like a Puzzle with Extra Pieces
A QR code is like a puzzle made of squares. Each square has a color, black or white, that helps tell a story. If some pieces are missing, the reader can still put together the rest because there are extra clues hidden in other parts of the puzzle. It’s like having a favorite toy where even if one leg breaks, you can still play with it.
They’re Like a Backpack with Extra Snacks
Think about going on a trip and packing extra snacks, just in case some get eaten. QR codes do something similar: they have extra bits of information that help them still work when parts of them are missing or damaged. That’s why even if you draw over part of a QR code with crayon, it can still be read by your phone.
So, it's not magic, it's just smart design!
Examples
- A QR code is like a puzzle, even if some pieces are missing, you can still solve it.
- Imagine a damaged map: you might not see all the roads, but you can still find your way home.
- You rip a corner off a poster, but you can still read most of the text.
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See also
- How Do QR Codes Work?
- Why Do QR Codes Work on Both Sides?
- Do elevator manufacturers purposefully provide a door close button that doesn't?
- Does Amazon use Oracle instead of AWS to run their business?
- Can Computers Read Your Mind?