Aim for clear text that returns the same results you would type manually. High‑contrast black‑and‑white often beats grayscale for forms. Modern engines approach excellent accuracy on clean prints, but smudges, stamps, and handwriting confuse them. Test by searching a unique invoice number or policy code. If the search fails, rescan with better lighting, flatten pages, and try a denoise pass. Consistent validation prevents invisible errors from silently compounding over months.
Some pages mix columns, tables, and checkboxes with tiny footnotes. Enable layout analysis, capture at higher resolution, and consider a flatbed for critical pages. For multilingual letters, add languages explicitly to the OCR profile. Preserve original PDFs, embed text layers, and avoid destructive conversions. If a signature or stamp matters, archive a high‑quality image. When structure is messy, prioritize searchability first, then revisit formatting if exporting to spreadsheets or notes later.
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