title: How to get the movement of a edge by Emgucv
body: <p>I am a newbie of programming. I am using emgucv for my project and now I am going to detect the movement of an edge. I may want to use this vector for further operation. However, I only find a lot of documentation on tracking the movement of features points. How can I do it on an edge?</p>
  
  <p>Thx a lot.</p>