2Dcode
2Dcode is a class of two-dimensional barcodes designed to store data in a matrix layout rather than a single linear row. Each code is made of a grid of black and white modules that encode alphanumeric data, binary data, or URLs. Because they can be scanned with cameras, they are usable by smartphones and standard barcode readers without specialized equipment.
The most widely known 2D codes include QR codes, Data Matrix, Aztec Code, and PDF417. They differ
Many 2D codes are governed by formal international standards. For example, QR codes are standardized as ISO/IEC
Common applications include product labeling, ticketing, inventory management, contact information exchange, and mobile payments. They are
Limitations include dependence on line of sight, potential degradation from printing or damage, and risk of