The following software is needed to run ocrodjvu:

* Python ≥ 2.6

* An OCR engine:

  + OCRopus_ 0.2, 0.3 or 0.3.1 —
    document analysis and OCR system

  + Cuneiform_ ≥ 0.7 (tested with 0.7, 0.8, 0.9, 1.0) —
    document analysis and OCR system

  + Ocrad_ (tested with 0.17 and 0.21) —
    document analysis and OCR system

  + GOCR_ ≥ 0.40 (tested with 0.48) —
    document analysis and OCR system

  + Tesseract_ ≥ 2.00 (tested with 2.04 and 3.00) —
    an OCR system

* DjVuLibre_ ≥ 3.5.21 —
  library for the DjVu_ file format

* python-djvulibre_ ≥ 0.1.14 —
  Python bindings for DjVuLibre_

* argparse_ —
  Python command line parser

* lxml_ —
  Python bindings for libxml2_

Additionally, some optional features require the following software:

* subprocess32_ -
  thread-safe replacement for the subprocess_ management module,
  backported from Python 3.X;
  strongly recommended for the ``-j``/``--jobs`` option

* PyICU_ -
  Python bindings for PyICU IBM's ICU_ C++ API;
  required for the ``--word-segmentation=uax29`` option

* html5lib_ -
  HTML parser based on the HTML5_ specification;
  required for the ``--html5`` option


The following software is needed to rebuild the manual pages from
source:

* xsltproc_ -
  command line XSLT processor, part of libxslt_

* `DocBook XSL stylesheets`_


.. _OCRopus:
   https://code.google.com/p/ocropus/
.. _Cuneiform:
   https://launchpad.net/cuneiform-linux
.. _Ocrad:
   https://www.gnu.org/software/ocrad/
.. _GOCR:
   http://jocr.sourceforge.net/
.. _Tesseract:
   https://code.google.com/p/tesseract-ocr/
.. _DjVuLibre:
   http://djvu.sourceforge.net/
.. _DjVu:
   http://djvu.org/
.. _python-djvulibre:
   http://jwilk.net/software/python-djvulibre
.. _ICU:
   http://site.icu-project.org/
.. _lxml:
   http://lxml.de/
.. _libxml2:
   http://xmlsoft.org/
.. _argparse:
   https://pypi.python.org/pypi/argparse
.. _subprocess32:
   https://pypi.python.org/pypi/subprocess32
.. _subprocess:
   https://docs.python.org/2/library/subprocess.html
.. _PyICU:
   https://pypi.python.org/pypi/PyICU/
.. _html5lib:
   https://github.com/html5lib/html5lib-python
.. _HTML5:
   https://whatwg.org/html
.. _xsltproc:
   http://xmlsoft.org/XSLT/xsltproc2.html
.. _libxslt:
   http://xmlsoft.org/XSLT/
.. _Docbook XSL stylesheets:
   http://wiki.docbook.org/DocBookXslStylesheets

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