[devmandan]

I'm less interested in the theory and am more interested in the practice. I own a printed copy of the 2015 version of the spec, but don't find the insights I get from it have much to do with its ability to scan as compared to taking my phone out and scanning a QR code does.

In practice, I mostly I find that the corners are the most finicky part. However, that is just my current opinion.

[echoangle]

I think if the corners really are more sensitive, it’s because the reader can’t find the QR code and it’s orientation, not because the data is not recoverable. If you would manually enter the pixels into a decoder, the corners shouldn’t be more sensitive than other spaces of the code, I think.