QRBarcodes

QRBarcodes are QR code–based barcodes, a two-dimensional symbol that stores data in a square grid of black and white modules. They are designed to be read by imaging devices such as smartphone cameras and dedicated scanners, and can encode URLs, text, contact information, calendar events, or small files.

Origins and terminology: QR codes were developed in 1994 by Denso Wave in Japan for rapid tracking of parts in manufacturing. The term QRBarcodes is not a formal standard but is commonly used to describe QR code symbols used in barcode-like applications across industries. They are one of several families of 2D barcodes, distinct from traditional one-dimensional barcodes.

Structure and capacity: A QR barcode contains finder patterns, alignment patterns, timing patterns, and a data region. Data capacity depends on the version (1 to 40) and the error correction level (L, M, Q, H). Higher error correction increases resilience but reduces capacity. Capabilities range from a few dozen characters to thousands of digits or bytes, depending on version and data type.

Printing and scanning: QRBarcodes rely on high contrast and adequate size for reliable reading. They can be scanned from screens or printed materials with cameras that support the QR specification. Dynamic variants can be used to route to a changing endpoint, while static codes embed fixed data.

Safety and best practices: To reduce security risks, verify URLs before opening, use trusted apps, and prefer dynamic codes from reputable sources. Accessibility considerations include legibility for users with visual impairment.