> On the QR topic, I don't understand how logos in the middle work. You are losing pixels and checks with the logo in the middle which is fine until you make th

> On the QR topic, I don't understand how logos in the middle work. You are losing pixels and checks with the logo in the middle which is fine until you make the logo too big. It is possible to add logos without (well, differently) abusing the error correction: https://research.swtch.com/qart https://research.swtch.com/qart Of course most images in the middle aren’t doing that and rely on some level of error correction fixing it.