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Note

Ocropus 0.4+ is now available.

Following notes are based on the instructions for installing OCRopus 3.0. The following notes were generated in the following environment:

  • OCRopus 0.3

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  • iulib 0.3
  • Ubuntu 8.10 (Intrepid Ibex)

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Before you Begin

Make sure your Ubuntu installation has the following components installed (not installed by default):

  • g++

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  • scons

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  • svn

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Note

If you have problems downloading any of the packages or libraries required, try changing the server which apt-get or Synaptic use. In our experience, mirror.csclub.uwaterloo.ca/ubuntu was good.

Following instructions here: http://sites.google.com/site/ocropus/install-0-3

The easiest way to change the download server is to use Synaptic Package Updater and change the repository location. Remember to Refresh in order for the changes to apply.

1. Installing iulib

  • Download iulib 0.3 package from iulib's google code page. http://code.google.com/p/iulib/
  • Get any missing libraries, run: sudo apt-get install libpng12-dev libjpeg62-dev libtiff4-dev libavcodec-dev libavformat-dev libsdl-gfx1.2-dev libsdl-image1.2-dev
  • First run sudo scons install //this avoids a colib error.
  • Then run sudo make install
      Error:
    • if you get errors downloading any of these libraries, change your package download server. See the note at the top of this document.
  • Run: sudo scons install (This will help avoid an error in the next step. Make sure to have scons installed.)
  • Run: sudo make install
Note

You may get the following error:

Code Block

./vidio/vidio.cc:484 error: cannot convert 'ByteIOContext**' to 'ByteIOContext*' for argument '1' to 'int url_fclose(ByteIOContext*)'

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To fix this, change Line 484 from url_fclose(&oc->pb); to url_fclose(oc->pb);

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2. Installing Tesseract

  • used SVN to checkout latest version of tesseract (make sure SVN is installed)
  • installed Make sure to have SVN installed prior to this step.
  • Installed tesseract according to instructions on OCRopus' install guide (http://sites.google.com/site/ocropus/install-0-3)
  • compiled and installed fine.

Installing OCRopus

  • ran ./configure
Code Block

svn co http://tesseract-ocr.googlecode.com/svn/trunk/ tesseract-ocr
cd tesseract-ocr
./configure
make
sudo make install

3. Installing OCRopus

Following the instructions listed here: http://sites.google.com/site/ocropus/install-0-3

Code Block

./configure --without-fst --without-leptonica
make
sudo make install
Note

OCRopus instructions only tell you to run make install, but you should be using sudo make install to install properly.

  • Note: running configure with the --without-SDL – OKran make – ERROR flag will cause an error during the make process:
Code Block
/home/leviticus/ocropus/iulib/utils/dgraphics.cc:154: undefined reference to `SDL_FillRect'
/home/leviticus/ocropus/iulib/utils/dgraphics.cc:155: undefined reference to `SDL_UpdateRect'
/home/leviticus/ocropus/iulib/utils/dgraphics.cc:157: undefined reference to `SDL_UpdateRect'
collect2: ld returned 1 exit status
make[1]: *** [ocroscript] Error 1
make[1]: Leaving directory `/home/leviticus/ocropus/ocropus-0.3/ocroscript'
make: *** [all-recursive] Error 1

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Therefore, make sure to not use the --without

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-

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SDL flag.

4. Running OCRopus

Run at command line:
ocroscript recognize data/pages/alive_1.png

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