Open Source Computer Vision Library https://opencv.org/
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.. _Linux-Installation:
Installation in Linux
***********************
These steps have been tested for Ubuntu 10.04 but should work with other distros.
Required packages
==================
* GCC 4.x or later. This can be installed with
.. code-block:: bash
sudo apt-get install build-essential
* CMake 2.6 or higher
* Subversion (SVN) client
* GTK+2.x or higher, including headers
* pkgconfig
* libpng, zlib, libjpeg, libtiff, libjasper with development files (e.g. libpjeg-dev)
* Python 2.3 or later with developer packages (e.g. python-dev)
* SWIG 1.3.30 or later (only for versions prior to OpenCV 2.3)
* libavcodec
* libdc1394 2.x
All the libraries above can be installed via Terminal or by using Synaptic Manager
Getting OpenCV source code
============================
You can use the latest stable OpenCV version available in *sourceforge* or you can grab the latest snapshot from the `SVN repository < http://code.ros.org/svn/opencv/>`_.
Getting the latest stable OpenCV version
------------------------------------------
* Go to http://sourceforge.net/projects/opencvlibrary
* Download the source tarball and unpack it
Getting the cutting-edge OpenCV from SourceForge SVN repository
-----------------------------------------------------------------
Launch SVN client and checkout either
a. the current OpenCV snapshot from here: https://code.ros.org/svn/opencv/trunk
#. or the latest tested OpenCV snapshot from here: http://code.ros.org/svn/opencv/tags/latest_tested_snapshot
In Ubuntu it can be done using the following command, e.g.:
.. code-block:: bash
cd ~/<my_working _directory>
svn co https://code.ros.org/svn/opencv/trunk
Building OpenCV from source using CMake, using the command line
================================================================
#. Create a temporary directory, which we denote as <cmake_binary_dir>, where you want to put the generated Makefiles, project files as well the object filees and output binaries
#. Enter the <cmake_binary_dir> and type
.. code-block:: bash
cmake [<some optional parameters>] <path to the OpenCV source directory>
For example
.. code-block:: bash
cd ~/opencv
mkdir release
cd release
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX= /usr/local
#. Enter the created temporary directory (<cmake_binary_dir>) and proceed with:
.. code-block:: bash
make
sudo make install
.. note::
If the size of the created library is a critical issue (like in case of an Android build) you can use the ``install/strip`` command to get the smallest size as possible. The *stripped* version appears to be twice as small. However, we do not recommend using this unless those extra megabytes do really matter.