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#ocr#correction#safe#parity#looks#reed#solomon#printed#characters#screenshots

Discussion (2 Comments)Read Original on HackerNews

Dwedit•about 3 hours ago
Do we have any screenshots of what the text looks like, and what the error correction looks like?
chasangchual•about 5 hours ago
I built a small Python Reed-Solomon codec aimed at OCR workflows where printed codes may be degraded by dot-matrix printers, missing pins, fading ribbons, low resolution, dirt, or partial character damage.

It uses GF(256) Reed-Solomon correction plus an OCR-safe parity representation using a reduced alphabet that avoids confusing characters like 0/O, 1/I/l, 5/S, 8/B, etc. Each parity byte is encoded as two OCR-safe characters, so printed labels or IDs can be scanned, checked, and corrected when OCR makes a limited number of symbol mistakes.

The repo includes a ReedSolomonForOcr class, OCR-safe parity helpers, a demo, and unit tests with deterministic correction scenarios.