====== Linux: Install OpenCV ======

It is better to compile OpenCV from scratch than to use the precompiled versions in Ubuntu as most of them are not optimized.

Make sure to have these packages installed:
  sudo apt-get install pkg-config ant libeigen3-dev sphinx-common libopenexr-dev libtbb-dev python-numpy

Get the OpenCV sources from here: [[http://sourceforge.net/projects/opencvlibrary/files/ |OpenCV]]

Extract the archive and prepare for compilation:
  tar -C ~/local/src/ -xf ~/Downloads/OpenCV-2.4.3.tar.bz2
  cd ~/local/src/OpenCV-2.4.3/
  mkdir build && cd build
  
Configure with following options:
  ccmake -DCMAKE_BUILD_TYPE=Release -DWITH_GIGEAPI=OFF -DWITH_CUDA=OFF -DWITH_PVAPI=OFF -DWITH_TBB=ON ..
  
Hit 'c' to configure and check that there are no dependency problems. Hit 'c' again and then 'g' to generate. Now we can compile and install with:
  make
  sudo make install

Add the pkg-config path to the end of your bashrc so that the OpenCV libraries can be found later by other programs:
  gedit ~/.bashrc
  export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig