Their use of “QR Code” is mighty confusing. QR (Quick Response) Codes are something specific that people are familiar with. These don’t share any characteristics apart from being images which represent something else. They’re not even the same colour or shape. Just call them “knot codes” or something.
I mean... There is a 1-1 mapping, and they look kinda like QR codes. so technically, you can make an app that scan it and it will show you the corresponding polynomial.. It could even be useful for fast checking knots
I think the comparison for the lay person is just fine. The author quoted the term and explains themselves.
A QR codes encode data to be scanned and converted for the convenience of the user.
These knot graphics encode data to be scanned and converted for the convenience of the user.