Installing OCRopus 0.3

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

OCRopus 0.3
iulib 0.3
Ubuntu 8.10 (Intrepid Ibex)

Before you Begin

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

g++
scons
svn

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.

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 will help avoid an error in the next step. Make sure to have scons installed.
Then run sudo make install
- Error: ./vidio/vidio.cc:484 error: cannot convert 'ByteIOContext*' to 'ByteIOContext' for argument '1' to 'int url_fclose(ByteIOContext*)'
- Solved using solution in post here: http://code.google.com/p/iulib/issues/detail?id=2 (change Line 484)

Installing Tesseract

used SVN to checkout latest version of tesseract (make sure SVN is installed)
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 --without-fst --without-leptonica --without-SDL – OK
ran make – ERROR

/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

re-ran ./configure --without-fst --without-leptonica (configure with SDL) – OK
ran make – OK
ran sudo make install (NOTE: OCRopus instructions only tell you to run make install) – OK

Running OCRopus

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

This will print an HTML document to stdout with the text conversion of the image. Pipe to Firefox or redirect output to file and open in browser.