GNU Ocrad vs OCRFeeder

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.

OCRFeeder is a Linux system for analyzing document layouts and recognizing text in images. It automatically outlines image content, separates graphics from text, and applies OCR to text regions. Its GTK graphical interface lets users correct recognition errors and bounding boxes, set paragraph styles, and clean input images. Users can import PDFs and save or load projects. The application exports to multiple formats, with ODT as its main format, and provides both a graphical interface and a command-line interface. It works with system-wide OCR engines, including command-line OCR engines. Documentation for the graphical interface is available from its Help menu or with F1. OCRFeeder is free software under the GNU General Public License, version 3 or any later version chosen by the user. The GNOME project page links to source code and release packages, and the project page links to a GitLab issue tracker. Its listed roadmap includes proposed additions such as plain-text export and undo/redo support. The README states that the software is provided without warranty.