By Provenance
Digital-native vs scanned variants. Scanned variants vary by DPI, noise, and skew - useful for OCR test suites.
| ID | Description | Facets | URL |
|---|---|---|---|
fax-cover-letter-scanned-noisy.pdf | Fax cover sheet rendered as a noisy 300 DPI scan - realistic faxed-document case. | fax-cover-sheetscanned-noisy | |
receipt-scanned-noisy-300dpi.pdf | Receipt rendered as a noisy 300 DPI scan - classic crumpled-receipt OCR target. | receiptscanned-noisy | |
scanned-clean-200dpi.pdf | Clean 200 DPI scan of a generic Letter PDF. | scanned-clean | |
scanned-clean-300dpi.pdf | Clean 300 DPI scan of a generic Letter PDF. | scanned-clean | |
scanned-noisy-300dpi.pdf | Noisy 300 DPI scan with high-density speckle noise. | scanned-noisy | |
scanned-skewed-3deg.pdf | Clean 300 DPI scan rotated 3 degrees. | scanned-skewed | |
scanned-skewed-noisy.pdf | Noisy 3-degree skewed 300 DPI scan - hardest realistic case. | scanned-noisy-skewed |