THE SHORT VERSION

A pattern that looks decorative helps a scanner find its bearings.

WHY CARE?This is here to help you understand the idea and use it—not merely finish a page.WHAT NEXT?Read the first section, explain it in your own words, then try the small task below.
OPEN ONLY WHAT YOU NEED.Start with the short answer. Expand each idea for examples, mistakes and the fuller explanation. Slides or video are added when they genuinely make the subject clearer.
01 · THE BIG IDEA

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IN PLAIN ENGLISH

QR codes were developed at DENSO WAVE to improve code reading. The three prominent corner patterns help a reader locate the code and determine its orientation.

02 · EXAMPLE

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IN PLAIN ENGLISH

Turning a printed code sideways usually does not stop a phone recognising it. Its position patterns give the reader useful clues before it decodes the message.

03 · TRY IT

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