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Tesseract is managed by a team at Google; the latest stable release can be found on the downloads page of their website, https://code.google.com/p/tesseract-ocr/downloads/list. A binary installer exists for Windows, and specific instructions for installing on a Mac through homebrew can MacPorts can be found in the Tesseract readme here: https://code.google.com/p/tesseract-ocr/wiki/ReadMe. For Linux users, or any others compiling it from source, you will need to make sure that you also have the Leptonica library installed, and that you have appropriate source building tools.

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Tesseract requires little configuration out of the box; that being said, Islandora supports the installation of multiple languages for OCR processing, and may even require English language support. . These additional languages can be found on Tesseract's download page.

To install additional languages into Islandora, you will need to know the path to your Tesseract installation's 'tessdata' folder. On Windows, this will tend to be C:\Program Files (x86)\Tesseract OCR\tessdata, and on Mac, this will tend to be /usr/local/Cellar/tesseract/<version>/share/tessdata - in both cases, if you've used the Tesseract website's own installation case. On Mac, any language can be installed with MacPorts by sudo port install tesseract-<langcode>. List of available langcodes can be found on MacPorts tesseract page.  On Linux, the path will vary from distribution to distribution, but will often be /usr/local/share/tessdata or /usr/share/tessdata. Once you have found the correct folder,

• Download one of the language tarballs from the website
• Extract it
• Copy the contents of the 'tessdata' folder inside the tarball to the 'tessdata' folder on your computer
• With the Islandora OCR module installed in your site, navigate to http://path.to.your.site/admin/islandora/tools/ocr and check off the new language
• Click 'Save configuration'

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