QR Code Reader
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QR Code Reader: How to Scan and Decode QR Codes
Learn how QR codes work and how to read them from any image.
What Are QR Codes?
QR codes (Quick Response codes) are two-dimensional barcodes invented by Denso Wave in 1994. Unlike traditional barcodes that store data in one dimension, QR codes use a matrix of black and white squares to encode information both horizontally and vertically, allowing them to store significantly more data — up to 7,089 numeric characters or 4,296 alphanumeric characters.
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