GNU Ocrad
6.5#30 in ocr softwareFree planFree planLinuxSelf-hosted
VisitGNU Ocrad vs Tesseract OCR
Tesseract OCR
7.9#2 in ocr softwareFree planFree planAndroidAPILinuxmacOS
VisitWhat both publish
| Fact | GNU Ocrad | Tesseract OCR |
|---|---|---|
| Free plan | Yes | Yes |
| Image quality | The manual recommends characters at least 20 pixels high and says scanning at 300 dpi usually produces a suitable character size. | The project notes that improving the input image quality may be needed to get better OCR results. |
| Output formats | The manual documents byte and UTF-8 text output, plus an OCR results file option containing structured recognition details. | Supported output formats include plain text, hOCR, PDF, invisible-text-only PDF, TSV, ALTO, and PAGE. |
| Purpose | GNU Ocrad is an OCR program and library based on feature extraction. | Tesseract is an OCR engine and command-line program for extracting printed text from images. |
| Support | The project page identifies the bug-ocrad mailing list as the appropriate forum for discussing errors. | The README directs users to documentation, FAQs, user and developer forums, past issues, and mailing lists, and says issues should be used for bug reports rather than questions. |
| Supported inputs | image | image |
GNU Ocrad plans
- GNU OcradFree
Tesseract OCR plans
- Tesseract OCRFree
Pick GNU Ocrad if…
Ocrad suits Linux or self-hosted users who need to extract text from PNG or PNM images, particularly printed pages with columns or text blocks. Its research-project status and sensitivity to character defects are worth considering.
Pick Tesseract OCR if…
Tesseract OCR suits developers building image-text recognition into applications, as well as desktop users who need searchable PDFs. It is not suited to handwriting OCR.