title: Emgu, what's the difference between .FindContours() and CvInvoke.FindContours()
body: <p>I just started to learn Emgu and OpenCV. So it might be a stupid question. When I look at Emgu documentation (see link <a href="https://stackoverflow.com/questions/24970577/finding-contour-points-in-emgucv">http://www.emgu.com/wiki/files/3.1.0/document/html/cb24a129-d9ce-57f3-19ad-0eaa27a77317.htm</a> ), I cannot find an example. But I suppose you used it in the form of</p>
  
  <pre><code>CvInvoke.FindContours(...)
  </code></pre>
  
  <p>But when I searched stackoverflow, I found this person just used the following form in the middle-bottom section of his code <a href="https://stackoverflow.com/questions/24970577/finding-contour-points-in-emgucv">enter link description here</a></p>
  
  <pre><code>grayImage.FindContours()
  </code></pre>
  
  <p>However, when I tried the later, Visual studio simply doesn't accept it. (ie, when I typed in grayImage.F the pop up simply doesn't have FindContours function). </p>
  
  <p>I am using the latest opencv and emgu. Any ideas?</p>