title: emguCV getting the largest blob
body: <p>i'm working on color tracking..
  and i'm specifically tracking an orange ball, a basketball ball perhaps, along with kinect for the body, i'm making a free throw shooting guide.
  here's my case</p>
  
  <p>i have already thresholded my image, eroded it to remove noise, and other insignificant objects (non-ball) and then dilated a few times to emphasize the ball..
  and so i've come to a final binary image - where i've successfully isolated the ball.. there are other blobs..(smaller blobs that aren't the ball).. how do i get the largest blob(the ball) and put a bounding box?</p>
  
  <p>i've tried hough circles btw, however this is very slow,,..thanks! some code would be useful</p>