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A small nested square within the code.
Also known as: Distortion correction square, Inner square QR code
The smaller nested square inside a QR code that lets a reader correct for distortion of the surface it is printed on.
Lets a reader correct for distortion when a QR code is printed on a curved or angled surface.
Contexts: Packaging
Is added in greater numbers as the code grows, so the number of alignment patterns is a rough indication of how much data a code carries.
Contexts: Packaging
A small solid square inside a square ring, set within the body of the code rather than at a corner.