GNU Ocrad vs ScanScan
GNU Ocrad
gnu.orgScanScan
baimiao.uzero.cnSide by side
| Figure | GNU Ocrad | ScanScan |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | — | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | — |
| iOS | — | Yes |
| Android | — | Yes |
| Self-hosted | Yes | — |
| Plans published | 1 | 2 |
| Spec score · OCR software | 7.9 (#25) | 8.5 (#11) |
| Free plan | Yes | Yes |
| Supported inputs | image | both |
| Support | The project page identifies the bug-ocrad mailing list as the appropriate forum for discussing errors. | The App Store listing says users can send feedback in app settings or email [email protected]. |
Plans
In their own words
GNU Ocrad
GNU Ocrad is a free OCR program and library for Linux and self-hosted use. It reads PNG and PNM images and produces recognized text as 8-bit bytes or UTF-8. Its layout analyzer can separate columns and text blocks on printed pages. Ocrad runs as a standalone console application or as a backend for other programs. Documented options cover image transformations, layout detection, character recognition, text filters, and an OCR results file containing structured recognition details. The software uses ISO 10646 internally, with character-set selection through the --charset option. The manual recommends characters at least 20 pixels high and says 300 dpi scanning usually reaches a suitable size. It also notes sensitivity to character defects and difficulty adding recognition for new characters. The project describes Ocrad mainly as a research project, with algorithms that may change in later releases. Latest releases are available through GNU mirrors, while older and testing versions are hosted on Savannah.
ScanScan
ScanScan has no write-up on Specifiction yet; its figures are above.