QR codes are now critical infrastructure here in NSW, Australia. Let's learn how to make them better.| huonw.github.io
A QR code can use one of four error correction levels. Higher error correction forces denser codes, but allows scanning in more situations. A trade-off!| huonw.github.io
This document describes the commonly used base 64, base 32, and base 16 encoding schemes. It also discusses the use of line-feeds in encoded data, use of padding in encoded data, use of non-alphabet characters in encoded data, use of different encoding alphabets, and canonical encodings. [STANDARDS-TRACK]| IETF Datatracker