title: Install opencv on Raspberry Pi Raspbian
body: <p>I am trying to install openCV in my RaspberryPi 3 running Raspbian Jessie OS. I am following this tutorial:
  <a href="http://pklab.net/index.php?lang=EN&amp;id=392" rel="nofollow noreferrer">http://pklab.net/index.php?lang=EN&amp;id=392</a></p>
  
  <p>After doing:</p>
  
  <pre><code>sudo apt-get update
  sudo apt-get upgrade
  </code></pre>
  
  <p>Things look fine. But when I try to install cmake to build my opencv libraries, I get the following error after entering the following command:</p>
  
  <p>Command entered:</p>
  
  <pre><code>sudo apt-get install build-essential cmake cmake-curses-gui pkg-config
  </code></pre>
  
  <p>Result:</p>
  
  <pre><code>The following packages have unmet dependencies:
   cmake : Depends: libjsoncpp0 but it is not installable
   cmake-curses-gui : Depends: libjsoncpp0 but it is not installable
  E: Unable to correct problems, you have held broken packages.
  </code></pre>
  
  <p>I can't seem to figure out what is going wrong. I tried to manually install cmake using wget from the mirror on the cmake website and still the same error comes up. Any help is appreciated!</p>