How QR Codes Are Built?

QR codes are like picture puzzles that can tell you secrets when you scan them with a phone or special reader.

Imagine you have a box of colored blocks, red, blue, green, and black. Each block is part of a bigger picture. A QR code works the same way, but instead of colored blocks, it uses black squares and white spaces to make its pattern.

A QR code has little squares inside it called modules. These modules are like tiny building blocks, each one is either black or white. When you put them together in certain ways, they form a message that your phone can read.

Think of it like a map: if you know where the black squares go, you can figure out what the code says. The more modules there are, the more information the QR code can hold, just like how a bigger puzzle has more pieces and can show a more detailed picture.

When your phone scans a QR code, it looks at all those little black and white squares and turns them into letters or numbers, like magic, but not really magic. It’s just clever patterns!