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An alternating line of modules.
Also known as: Module grid line QR, Alternating line QR code
The alternating row and column of light and dark modules by which a QR reader establishes the code's module grid.
Establishes the module grid a QR reader uses to divide the code into cells.
Contexts: Packaging
Does for a two-dimensional code what the guard pattern does for a linear one, so both symbologies solve scale independence with a known reference built into the symbol.
Contexts: Packaging
A single row and a single column of alternating light and dark squares running between the corner finder patterns.