Scanning Lexicon.

Small squares within a QR code (excluding Version 1) that help the scanner identify and correct for perspective distortion and non-linear movement.

A QR encoding mode that stores numbers 0-9, upper case letters A-Z, and nine symbols. It is more space-efficient than Byte mode for standard text.

A type of 2D barcode that resembles a QR code but uses a single central finder pattern rather than three in the corners. Often used in transport tickets.

An error correction code used specifically in the format and version information sections of a QR code to ensure basic structural data is readable.

The most versatile QR encoding mode, allowing for any 8-bit character (ISO-8859-1). Ideal for URLs and complex data strings.

A QR code that encodes a redirect URL, allowing the destination to be changed after the code is printed and providing scan analytics.

The amount of mathematical redundancy added to the code (L, M, Q, H). Higher levels allow for more damage resistance but result in larger code sizes.

The three large squares in the corners of a QR code that allow the scanner to detect the orientation and position of the code.

The 15 bits of data distributed around the finder patterns that tell the scanner the error correction level and the mask pattern used.

A global standard for using QR codes to bridge standard product barcodes (EAN/UPC) with consumers' mobile devices.

A specialized QR encoding mode designed specifically for Japanese Shift JIS characters, allowing for high-density storage of Japanese text.

A mathematical transformation applied to the QR modules to prevent large blocks of identical colors, ensuring better scan reliability.

The fundamental black or white squares that make up a QR code. The arrangement of these modules encodes the actual data.

The QR scanning software built directly into a smartphone's camera app, requiring no third-party downloads.

The most efficient QR encoding mode, used only for strings consisting solely of digits 0-9.

The process by which a scanner's software adjusts for the angle at which a QR code is being held, flattening the image for easier reading.

A mandatory blank border surrounding the QR code, usually 4 modules wide, that helps the scanner identify the start and end of the code.

A portmanteau of 'QR' and 'Phishing.' A cyberattack where users are tricked into scanning a malicious QR code that leads to a fake website.

The mathematical algorithm used to generate parity data for a QR code, allowing it to remain readable even if portions are missing.

A condensed web address used in Dynamic QR codes to reduce module density and allow for tracking and redirection.

A QR code where the data is encoded directly into the pattern and cannot be changed after the code is generated.

The horizontal and vertical dotted lines connecting the finder patterns, used by the scanner to determine the size of the module grid.

A file format standard for electronic business cards. QR codes can encode vCard data for instant contact syncing.

The size classification of a QR code, ranging from Version 1 (21x21 modules) to Version 40 (177x177 modules).

A standard string format (WIFI:S:;T:;P:;;) used to automate the connection to a wireless network via a single scan.