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.. _Linux-Installation:
Installation in Linux
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***** ***** ***** ***** *
These steps have been tested for Ubuntu 10.04 but should work with other distros as well.
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Required Packages
=================
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* GCC 4.4.x or later. This can be installed with:
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.. code-block :: bash
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sudo apt-get install build-essential
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* CMake 2.6 or higher;
* Git;
* GTK+2.x or higher, including headers (libgtk2.0-dev);
* pkgconfig;
* Python 2.6 or later and Numpy 1.5 or later with developer packages (python-dev, python-numpy);
* ffmpeg or libav development packages: libavcodec-dev, libavformat-dev, libswscale-dev;
* [optional] libdc1394 2.x;
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* [optional] libjpeg-dev, libpng-dev, libtiff-dev, libjasper-dev.
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All the libraries above can be installed via Terminal or by using Synaptic Manager.
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Getting OpenCV Source Code
==========================
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You can use the latest stable OpenCV version available in *sourceforge* or you can grab the latest snapshot from our `Git repository <https://github.com/Itseez/opencv.git> `_ .
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Getting the Latest Stable OpenCV Version
----------------------------------------
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* Go to our `page on Sourceforge <http://sourceforge.net/projects/opencvlibrary> `_ ;
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* Download the source tarball and unpack it.
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Getting the Cutting-edge OpenCV from the Git Repository
-------------------------------------------------------
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Launch Git client and clone `OpenCV repository <http://github.com/itseez/opencv> `_
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In Linux it can be achieved with the following command in Terminal:
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.. code-block :: bash
cd ~/<my_working _directory>
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git clone https://github.com/Itseez/opencv.git
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Building OpenCV from Source Using CMake, Using the Command Line
===============================================================
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#. 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 files and output binaries.
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#. Enter the <cmake_binary_dir> and type
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cmake [<some optional parameters> ] <path to the OpenCV source directory>
For example
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cd ~/opencv
mkdir release
cd release
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cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..
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#. Enter the created temporary directory (<cmake_binary_dir>) and proceed with:
.. code-block :: bash
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make
sudo make install
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.. note ::
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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.
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