Comment by geoffeg
4 years ago
This is great. I did something very similar with a laser printer and a scanner many years ago. I wrote a script that generated pages of colored blocks and spent some time figuring out how much redundancy I needed on each page to account for the scanner's resolution. I think I saw something similar here or on github a few years ago.
Reminds me of "Cauzin Softstrip", the format some computer magazines used back in the day to distribute BASIC programs, or even executables.
Random example from an issue of Byte:
https://archive.org/details/byte-magazine-1986-05/page/n432/...
Searching HN for "paper backup" gives a lot of existing solutions, in fact too many that I don't know which one you saw.
So you invented QR codes?
Overly complicated, color QR codes.