QR codes

Phone QR scan

2D matrix + finders

1/6

A QR code is a block of small light and dark squares (modules) on a light background.
Three large corner squares (finders) sit in an L — the fourth corner stays empty on purpose.

Legend

	QR 2D modules
	Finders L = which way up
	Camera Whole image
	Payload URL / data
	Capacity vs barcode

Coming soon

Extra practice and notes will live here.