How QR codes work

Chapter 1

The board game inspiration

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Answer

Chapter 2

Anatomy of the square

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Chapter 3

The magic of error correction

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Chapter 4

From factory floor to global daily life

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YOUR GOAL

Master of How QR codes work

Ch 2 · Anatomy of the square

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marc QR Code Anatomy

Three big corner squares show which way is up! (Which way is up!)

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marc Inside the Square

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marc The quiet zone boundary

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marc The three magic squares

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marc The tiny alignment squares

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marc Timing patterns and grid lines

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marc The quiet zone boundary

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Fun Fact

Scanning upside down: The three large corner squares allow a QR code to be scanned from any 360-degree angle.

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marc The tiny alignment squares

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Quiz

What is the minimum width of the blank 'quiet zone' border around a QR code?

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Gossip

Best place for a QR code?

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Quiz

What are the three large squares in the corners of a QR code called?

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Quiz

What is the purpose of the blank white border around a QR code?

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Quiz

What shape are the modules that make up the data grid of a standard QR code?

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Quiz

What do the tiny, smaller squares inside a QR code do?

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Quiz

Why can a QR code be successfully scanned even when it is upside down?

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Quiz

How does a scanner determine the size of individual pixels in a QR code?

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Quiz

What are the alternating black and white tracks between the corner squares called?

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