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A TIFF reader that will read uncompressed TIFF images is also included. Islandora Book Solution Pack requires at least Tesseract version 3.202.202, which can be obtained from the project home page. 

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• Islandora
• Tuque
• Tesseract (3.02.02 or later)
• ImageMagicImageMagick (Optional, Required for OCR preprocessing)
• Islandora Paged Content (Optional)

Islandora recommends this module for text search of OCR-ed material:

• Islandora Solr Search

Tesseract installation will differ depending on your operating system; please see the Tesseract README Wiki for detailed instructions.

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• Set the path for Tesseract
• Select languages available for OCR from your Tesseract installation
• Enable/disable Solr Fast Vector Highlighting
• Set Solr field containing OCR text and the maximum number of results to return in a Solr query

Solr result highlighting

To have Islandora viewers recognize Solr search results and highlight them, one will need to configure Solr to index the HOCR (coordinate data) in a particular fashion.

The field that the HOCR is stored in must have the following attributes:   indexed="true" stored="true" termVectors="true" termPositions="true" termOffsets="true"

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Any objects that were previously ingested but require this functionality will need to be re-indexed.

XSLT Reference Implementation for GSearch

Tesseract

Tesseract provides many languages which can be downloaded from here.

To install just unzip them in your tessdata directory, typically located at /usr/local/share/tessdata

If you want to add your own languages or train your Tesseract for your specific needs please review the documentation here.

It is recommended to check the Tesseract page for more information on these options.

Note: If you running Linux distribution Tesseract software and language might be available in your repo, you can check it (e.g. on Ubuntu apt-cache search tesseract or on CentOS yum search tesseract for Tesseract and available languages,

for specific language: Ubuntu apt-cache search tesseract | grep Greek , CentOS yum search tesseract | grep Greek) when checked and found just install it on your server.