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This is really cool! Thanks for sharing! Is there a way to get it to compute and visualize the MAXIMUM possible error rate for any given QR code? Like what is

This is really cool! Thanks for sharing! Is there a way to get it to compute and visualize the MAXIMUM possible error rate for any given QR code? Like what is the greatest number and arrangement of pixels that could be altered before the QR code is no longer readable? (Bonus: Is this a setting that can be controlled during QR code generation, based on version number or error correction level, etc.? Can you make some sort of huge and very complex QR code with a lot more redundancy than a smaller one?)

Xiione 1y ago
Thanks for checking it out! Essentially, for any given QR code the maximum error rate is reached when you deplete every block's health bar to 1 remaining slice, making sure to invert every pixel in each codeword you've touched (the individual tetris-piece shaped chunks), and then introduce one more single pixel error in any block. This is actually independent of the arrangement of corrupted codewords within each block. The amount of redundancy is determined solely by the specific version-ecLevel pair a code has. So, the code with the largest amount of redundancy (in bytes) is one that has version 40 and EC level H - a staggering 2.43kB of redundancy vs. 1.28kB of data! See this particular sample: https://qris.cool/decode?sample=135 https://qris.cool/decode?sample=135