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| − | {{ | + | {{Infobox_tool |
| + | |purpose=Open source OCR engine, accepting uncompressed TIFF files as input | ||
|image=Tesseract.png | |image=Tesseract.png | ||
| − | + | |homepage=http://code.google.com/p/tesseract-ocr/ | |
| − | |homepage= | ||
|license=Apache 2.0 License EXCEPT the tesseractTrainer.py, which is licensed with GPL | |license=Apache 2.0 License EXCEPT the tesseractTrainer.py, which is licensed with GPL | ||
|platforms=Linux, Windows, MacOSX | |platforms=Linux, Windows, MacOSX | ||
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}} | }} | ||
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| + | <!-- Delete the Categories that do not apply --> | ||
| + | [[Category:OCR]] | ||
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= Description = | = Description = | ||
Tesseract is probably the most accurate open source OCR engine available. Combined with the [http://leptonica.com/ Leptonica Image Processing Library] it can read a wide variety of image formats and convert them to text in over 60 languages. It was one of the top 3 engines in the 1995 UNLV Accuracy test. Between 1995 and 2006 it had little work done on it, but since then it has been improved extensively by Google. | Tesseract is probably the most accurate open source OCR engine available. Combined with the [http://leptonica.com/ Leptonica Image Processing Library] it can read a wide variety of image formats and convert them to text in over 60 languages. It was one of the top 3 engines in the 1995 UNLV Accuracy test. Between 1995 and 2006 it had little work done on it, but since then it has been improved extensively by Google. | ||
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==Licensing and cost== | ==Licensing and cost== | ||
| − | Tesseract is an Open Source OCR engine, available under the [http://www.apache.org/licenses/LICENSE-2.0 Apache 2.0 license]. It can be used directly, or (for programmers) using an [ | + | Tesseract is an Open Source OCR engine, available under the [http://www.apache.org/licenses/LICENSE-2.0 Apache 2.0 license]. It can be used directly, or (for programmers) using an [http://code.google.com/p/tesseract-ocr/source/browse/trunk/api/baseapi.h API]. |
==History== | ==History== | ||
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GIF is not supported [http://www.leptonica.com/library-overview.html http://www.leptonica.com/library-overview.html]. | GIF is not supported [http://www.leptonica.com/library-overview.html http://www.leptonica.com/library-overview.html]. | ||
===Output generated=== | ===Output generated=== | ||
| − | + | Tesseract outputs to TXT. PDF output was added in version 3.03. | |
==Documentation and support== | ==Documentation and support== | ||
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*Installation information is found on the [https://code.google.com/p/tesseract-ocr/wiki/ReadMe ReadMe] page of the project site. | *Installation information is found on the [https://code.google.com/p/tesseract-ocr/wiki/ReadMe ReadMe] page of the project site. | ||
*Support is offered and issues are addressed on the [https://code.google.com/p/tesseract-ocr/issues/list Issues] page of the project site. | *Support is offered and issues are addressed on the [https://code.google.com/p/tesseract-ocr/issues/list Issues] page of the project site. | ||
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==Usability== | ==Usability== | ||
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= User Experiences = | = User Experiences = | ||
| + | ==Experiences with Tesseract== | ||
*Lazorchak, Butch. (2014). Making Scanned Content Accessible Using Full-text Search and OCR [http://blogs.loc.gov/digitalpreservation/2014/08/making-scanned-content-accessible-using-full-text-search-and-ocr/ http://blogs.loc.gov/digitalpreservation/2014/08/making-scanned-content-accessible-using-full-text-search-and-ocr/] | *Lazorchak, Butch. (2014). Making Scanned Content Accessible Using Full-text Search and OCR [http://blogs.loc.gov/digitalpreservation/2014/08/making-scanned-content-accessible-using-full-text-search-and-ocr/ http://blogs.loc.gov/digitalpreservation/2014/08/making-scanned-content-accessible-using-full-text-search-and-ocr/] | ||
*Texas A&M University. (2012-). Early Modern OCR Project Workflow [http://emop.tamu.edu/about http://emop.tamu.edu/about http://emop.tamu.edu/about http://emop.tamu.edu/about] | *Texas A&M University. (2012-). Early Modern OCR Project Workflow [http://emop.tamu.edu/about http://emop.tamu.edu/about http://emop.tamu.edu/about http://emop.tamu.edu/about] | ||
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*Lacy, David. (2014). Digital Library upgrade provides enhanced discovery [http://blog.library.villanova.edu/digitallibrary/2014/02/18/digital-library-upgrade-provides-enhanced-discovery/#sthash.OwCtLlEc.dpuf http://blog.library.villanova.edu/digitallibrary/2014/02/18/digital-library-upgrade-provides-enhanced-discovery/#sthash.OwCtLlEc.dpuf] | *Lacy, David. (2014). Digital Library upgrade provides enhanced discovery [http://blog.library.villanova.edu/digitallibrary/2014/02/18/digital-library-upgrade-provides-enhanced-discovery/#sthash.OwCtLlEc.dpuf http://blog.library.villanova.edu/digitallibrary/2014/02/18/digital-library-upgrade-provides-enhanced-discovery/#sthash.OwCtLlEc.dpuf] | ||
*Applied in an AQuA Mashup that resulted in the Solution page: [http://wiki.opf-labs.org/display/AQuA/Compare+OCR+results+of+the+same+source+material+in+different+formats+%28TIFF%2C+JP2%29 Compare OCR results of the same source material in different formats (TIFF, JP2)] | *Applied in an AQuA Mashup that resulted in the Solution page: [http://wiki.opf-labs.org/display/AQuA/Compare+OCR+results+of+the+same+source+material+in+different+formats+%28TIFF%2C+JP2%29 Compare OCR results of the same source material in different formats (TIFF, JP2)] | ||
| + | ==Experiences with software integrating Tesseract== | ||
| + | *Integration with the free [http://www.dcc.ac.uk/resources/external/xena-software-0 Xena-Digital Preservation Software][http://sourceforge.net/projects/xena/?source=navbar http://sourceforge.net/projects/xena/?source=navbar] | ||
| + | *Integration with Free Online OCR [http://www.free-ocr.com/faq.html http://www.free-ocr.com/faq.html] | ||
| + | = Activity Feeds = | ||
| + | ==Google Code Source Feed== | ||
| + | Below the last 5 source updates: | ||
| + | <rss max=5>https://code.google.com/feeds/p/tesseract-ocr/gitchanges/basic</rss> | ||
| + | ==Google Code Wiki Feed== | ||
| + | Below are the last 3 wiki updates: | ||
| + | <rss max=3>https://code.google.com/feeds/p/tesseract-ocr/gitchanges/basic?repo=wiki</rss> | ||
| + | ==Google Code Issue Feed== | ||
| + | Below are the last 3 issue updates: | ||
| + | <rss max=3>https://code.google.com/feeds/p/tesseract-ocr/issueupdates/basic</rss> | ||
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| − | + | {{Infobox_tool_details | |
| + | |ohloh_id=tesseract-ocr | ||
| + | }} | ||