[femto]

What's the noise margin like?

QR codes with logo's typically contain bit errors and rely on the forward error correction code to correct those errors. The logo comes at the cost of some noise margin.

I'd guess that that the same applies here? All good if decoration is your priority, but if reliability is also a priority you have to be aware of the tradeoff.

[rldjbpin]

this.

i wonder if all qr code scanners follow a standard way to read the code, while accounting for the redundant data and checking for errors.

might explain why my phone struggles to scan some of them.