title: Shape recognition after edge detection
body: <p>I'm working on my first computer vision project where I take a picture of a chart and detect the symbols on it.  There are 5 distinct shapes that need to be detected.  </p>
  
  <p>This is the result of my edge detection algorithm: <a href="http://i.imgur.com/mh9Ol.jpg">http://i.imgur.com/mh9Ol.jpg</a>.  The 5 symbols are a single dot, 4 dots grouped together, a rectangle, and 2 oddly shaped symbols.</p>
  
  <p>At this point I'm not sure which algorithms I should look at that will allow me to pick out these shapes and discern them from each other.  Any ideas would be very helpful. Thanks!</p>