How to estimate a QR code redunduncy level?
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Question
I'm not a specialist, but as far as I know, a bit of information in a QR-code is coded more than once, and it is defined as the redundancy level
How can I estimate a QR-code redundancy level ? Is where an mobile app or a website where I can test my QR-code redundancy level easily ? If not, is it an easy algorithm that I can implement ?
Redundancy is sorted in different categories according to this website, but I'd like to have the direct percentage value if possible
Answer
QR codes contain a couple of bits which indicate the error correction level, as depicted below (source):
