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Three nested squares at the corners.
Also known as: QR corner squares, Finder pattern QR
The pattern of three nested squares at three corners of a QR code, by which a reader finds the code and its orientation.
Lets a reader locate a QR code and determine its orientation.
Contexts: Packaging
Appears at three corners and not four, and that asymmetry is what tells a reader which way up the code is, so the missing fourth corner is the informative part.
Contexts: Packaging
A solid square inside a square ring inside another solid square, repeated at three of the code's four corners.