GeneratorsLesson 46Free preview

QR Code

This lesson is part of Web Developer Tools · All levels

Summary

QR codes are two-dimensional barcodes that store data in a black and white module arrangement. QR generators turn text, URLs, or other data into images that the camera can scan. Data capacity is affected by the QR version, encoding mode, and the error correction rate chosen. Higher correction rates make code more resistant to damage, but the data capacity is reduced.

Key points

QR codes store two-dimensional data that can be scanned by cameras
The error correction levels L, M, Q, and H determine the resistance to damage
The higher the error correction, the smaller the data capacity.
Quiet zone or empty margin around the code should be maintained
QR codes can contain text, URLs, contacts, or network configurations

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