title: best algo to track an object in an AVI video, with opencv in c++
body: <p>I would like to track a target in video AVI I made, I run a lukas Kanade algo I found on internet and it's not doing what I whant because it follow every point moving in the record. 
  Do you know if there is an algo in open source whith wich I can select my target with an ROI and track in each frame ?
  (I use opencv 2.4.6 with Visual studio 2013)</p>