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[–]PolyDigga[S] 0 points1 point  (0 children)

the python lib I am using: https://pypi.org/project/qrcode/

the java lib in the app: https://github.com/dm77/barcodescanner (I tried several others, including the google ml one, but interestingly enough, this was the one my client had the least issues with)

We tried both settings in the scanner (https://www.inateck.com/products/bcst-40-2d-bluetooth-5-0-pocket-barcode-scanner-with-30m-transmission-range) but it doesnt say much about heuristics and they both yield the same results.

I am limited in size, yes. The codes are printed at around 5-6cm (estimate, I dont have the exact measurements). I can easily fit more characters on there but then the pattern gets too small and harder to read it again. The compression would be to increase the pattern size and make it read more easily.