Hacker News Reader

Do QR codes provide any error correction, or is the a crease, fold or spec of dirt on the paper you printed on going to render your QR-encoded key unreadable?

View on HN

It is a variable setting for each code. Here's a damaged but readable QR code: https://en.wikipedia.org/wiki/QR_code#/media/File:QR_Code_Da...

Reply on news.ycombinator.com