Viscount Systems has been awarded U.S. Patent 8941465 B2, outlining a system and method for physical access control using QR codes and mobile devices, as part of its Freedom Access Control Solution.

[Herb Peyerl] is part of a robotics team, and in his robotics endeavours, learned about AprilTags; small QR-code-like printable patterns that are easily recognizable by even primitive machine vision.

What is a QR code? A QR code (short for Quick Response code) is a two-dimensional barcode that can be read by your smartphone camera. QR codes provide quick access to product information, promotions ...

The last two years have been something of a renaissance for QR codes in the United States. Brands across industries were forced to embrace them to deliver products and services in contact-free ways.