# LAREX

> semi-automatic open-source tool for Layout Analysis and Region EXtraction on early printed books

**Wikidata**: [Q124348103](https://www.wikidata.org/wiki/Q124348103)  
**Source**: https://4ort.xyz/entity/larex

## Summary
LAREX is a semi-automatic open-source tool designed for document layout analysis and region extraction in early printed books. It is part of the OCR4all project and operates on PAGE-XML file formats, making it a specialized tool for processing historical printed materials.

## Key Facts
- **Software type**: Non-tangible executable component of a computer
- **Primary use**: Document layout analysis
- **License**: MIT License
- **Latest stable version**: 0.7.4 (released 2022-04-12)
- **Readable/writable file format**: PAGE-XML
- **Source code repository**: [GitHub](https://github.com/OCR4all/LAREX)
- **Copyright status**: Copyrighted
- **Related software**: OCR4all (Open-Source Tool Providing a (Semi-)Automatic OCR Workflow for Historical Printings)

## FAQs
### Q: What is LAREX used for?
A: LAREX is used for layout analysis and region extraction in early printed books, helping to structure and analyze historical documents for further processing.

### Q: Is LAREX open-source?
A: Yes, LAREX is open-source and licensed under the MIT License, allowing for free use and modification.

### Q: What file formats does LAREX support?
A: LAREX reads and writes PAGE-XML files, a standard format for document layout analysis.

### Q: How can I access LAREX?
A: The source code for LAREX is available on its [GitHub repository](https://github.com/OCR4all/LAREX).

### Q: What is the latest version of LAREX?
A: The latest stable version is 0.7.4, released on April 12, 2022.

## Why It Matters
LAREX plays a crucial role in the digitization and preservation of early printed books by automating the layout analysis process. This tool helps researchers and librarians extract and structure text regions from historical documents, making them more accessible for further analysis or transcription. By leveraging PAGE-XML, LAREX ensures compatibility with other document processing tools, contributing to a broader ecosystem of historical document preservation. Its open-source nature encourages collaboration and customization, allowing users to adapt the tool to specific needs in the study of early printed materials.

## Notable For
- **Specialization in early printed books**: Unlike general-purpose layout analysis tools, LAREX is tailored for historical documents, addressing unique challenges in their digitization.
- **Integration with OCR4all**: LAREX is part of the OCR4all project, enhancing its workflow for historical OCR tasks.
- **PAGE-XML compatibility**: Its support for PAGE-XML ensures seamless integration with other document analysis tools.
- **Open-source development**: The MIT License allows for widespread use and modification, fostering community contributions.
- **Stable releases**: Regular updates, with the latest version (0.7.4) released in 2022, demonstrate ongoing maintenance and improvement.

## Body
### Overview
LAREX is a semi-automatic tool developed for layout analysis and region extraction in early printed books. It is part of the OCR4all project, which provides a comprehensive workflow for processing historical printings.

### Technical Details
- **File Formats**: LAREX reads and writes PAGE-XML, a standard format for document layout analysis.
- **License**: The software is released under the MIT License, promoting open-source collaboration.
- **Versions**: The tool has undergone multiple updates, with the latest stable version being 0.7.4, released on April 12, 2022.

### Development and Accessibility
- **Source Code**: The source code is hosted on GitHub, allowing users to access, modify, and contribute to the project.
- **Copyright**: LAREX is copyrighted, ensuring legal protection for its developers.

### Related Tools
- **OCR4all**: LAREX is integrated with OCR4all, an open-source tool for historical OCR workflows, enhancing its capabilities for processing early printed materials.

## References

1. [Release 0.3.0. 2020](https://github.com/OCR4all/LAREX/releases/tag/0.3.0)
2. [Release 0.3.1. 2020](https://github.com/OCR4all/LAREX/releases/tag/0.3.1)
3. [Release 0.4.0. 2020](https://github.com/OCR4all/LAREX/releases/tag/0.4.0)
4. [Release 0.5.0. 2020](https://github.com/OCR4all/LAREX/releases/tag/0.5.0)
5. [Release 0.6.0. 2021](https://github.com/OCR4all/LAREX/releases/tag/0.6.0)
6. [Release 0.7.0. 2022](https://github.com/OCR4all/LAREX/releases/tag/0.7.0)
7. [Release 0.7.1. 2022](https://github.com/OCR4all/LAREX/releases/tag/0.7.1)
8. [Release 0.7.2. 2022](https://github.com/OCR4all/LAREX/releases/tag/0.7.2)
9. [Release 0.7.3. 2022](https://github.com/OCR4all/LAREX/releases/tag/0.7.3)
10. [Release 0.7.4. 2022](https://github.com/OCR4all/LAREX/releases/tag/0.7.4)
11. [Release 0.7.5. 2024](https://github.com/OCR4all/LAREX/releases/tag/0.7.5)
12. [Release 0.7.6. 2024](https://github.com/OCR4all/LAREX/releases/tag/0.7.6)