▦ Technology
How Do QR Codes Store Information?
What those black-and-white squares are actually doing.
A QR code is a visual way of storing digital information. A camera reads its pattern and software converts that pattern into data such as a web address or text.
How it works
- The pattern contains small square modules arranged in a grid.
- Position markers help the scanner identify the code's orientation.
- Error correction lets the code remain readable even when part of it is damaged.
- The decoded information is passed to the relevant app or browser.
Key takeaway: QR codes are not magical images; they are structured data encoded into a pattern that computers can recognize.