title: OpenCV Installation in Linux/Ubuntu
body: <p>I am doing this Tutorial 
  <a href="http://docs.opencv.org/doc/tutorials/introduction/linux_install/linux_install.html#linux-installation" rel="nofollow">http://docs.opencv.org/doc/tutorials/introduction/linux_install/linux_install.html#linux-installation</a>
  But I got confused. I stopped at building the OpenCV from source.</p>
  
  <p>I already created an File called Workspace where I made the <strong>cmake_binary_dir</strong> (named release). I downloaded the sourcefile (which is in my home directory and named: opencv-2.3.1), and now I want to run this </p>
  
  <p><code>cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..</code></p>
  
  <p>where I use:</p>
  
  <pre><code>cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/home/markus/opencv-2.3.1
  </code></pre>
  
  <p>But the Terminal keeps telling me, that this source directory does not exist!?
  So what I am doing wrong? </p>