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2. List of PDF software - Wikipedia

   en.wikipedia.org/wiki/List_of_PDF_software

   PDF-XChange Viewer: Freeware viewer with free OCR, ... Supports OCR and export of PDF text and images. Sumatra PDF: A free (GPL), open source PDF reader based on ...

3. Poppler (software) - Wikipedia

   en.wikipedia.org/wiki/Poppler_(software)

   Poppler is a free and open-source software library for rendering Portable Document Format (PDF) documents. Its development is supported by freedesktop.org . Commonly used on Linux systems, [ 4 ] it powers the PDF viewers of the GNOME and KDE desktop environments .

4. Optical character recognition - Wikipedia

   en.wikipedia.org/wiki/Optical_character_recognition

   Video of the process of scanning and real-time optical character recognition (OCR) with a portable scanner. Optical character recognition or optical character reader (OCR) is the electronic or mechanical conversion of images of typed, handwritten or printed text into machine-encoded text, whether from a scanned document, a photo of a document, a scene photo (for example the text on signs and ...

5. Tesseract (software) - Wikipedia

   en.wikipedia.org/wiki/Tesseract_(software)

   Tesseract is an optical character recognition engine for various operating systems. [5] It is free software, released under the Apache License. [1] [6] [7] Originally developed by Hewlett-Packard as proprietary software in the 1980s, it was released as open source in 2005 and development was sponsored by Google in 2006.

6. Comparison of optical character recognition software - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_optical...

   This comparison of optical character recognition software includes: . OCR engines, that do the actual character identification; Layout analysis software, that divide scanned documents into zones suitable for OCR

7. eScriptorium - Wikipedia

   en.wikipedia.org/wiki/EScriptorium

   At the heart of eScriptorium is the free OCR software Kraken by Benjamin Kiessling, a derivative of the OCR software OCRopus, which is suitable for handwritten and printed texts and also supports scripts such as Hebrew and Arabic, which are written from right to left. [6]