QR codes are 2D barcodes that store digital data like URLs, contact info, and more. Learn how they work, where they're used, and the difference between static and dynamic QR codes.
QR codes (Quick Response codes) are 2D barcodes that store data in a grid of black and white squares, allowing smartphones to easily scan and access information like websites, contact details, or other digital content.
Here's a breakdown:
What they are:
2D Barcode:
QR codes are an evolution of traditional barcodes, using a grid pattern to store much more information.
Data Storage:
They can store various data types, including URLs, text, contact information, Wi-Fi details, and more.
Scanability:
Smartphones can easily scan QR codes with their cameras, often with built-in functionality or through apps.
History:
QR codes were invented in 1994 by Masahiro Hara of Denso Wave for labeling automobile parts, but have since become popular for marketing and other applications.
How they work:
- Data Encoding: QR codes encode data as a series of pixels in a grid pattern.
- Scanning: When scanned, the camera captures the image, and the scanner decodes the pixel arrangement to extract the stored information.
- Error Correction: QR codes incorporate error correction, allowing them to be scanned even if partially damaged or obscured.
Uses:
Marketing:
QR codes are used to direct customers to websites, social media pages, online menus, event registration, etc.
Business:
They can be used for payment collection, sharing contact information, and providing instructions or access to online resources.
Everyday Life:
You might see them on business cards, posters, menus, or even product packaging.
Dynamic QR Codes:
Some QR codes are "dynamic," meaning the linked content can be updated even after the code is printed.
Static QR Codes:
Static QR codes are fixed and cannot be changed once created.