851 B
851 B
Persian / cloud OCR
Why deferred
Local OCR (e.g. Tesseract + fas/fa) may be good enough — or may destroy RTL, digits, and legal phrasing. Don’t commit to a vendor until measured.
Trigger
Local OCR on a Farsi Scanned PDF sample set produces systematically bad characters, broken line order, or unusable tables.
Options to A/B
| Option | Pros | Cons |
|---|---|---|
| Tesseract + Persian models | Free, offline, no data leaving the box | Quality varies; tuning burden |
| Cloud OCR (Google / Azure / etc.) | Often better on Persian print | Cost, latency, compliance |
| Commercial Persian-focused OCR | Domain fit | Vendor lock-in |
Success criteria
- Character error rate low enough that answer Faithfulness in Experiments doesn’t collapse vs Text PDF baseline
- RTL paragraphs stay coherent in Chunk Preview