title: emguCV 3.1 - face detection
body: <p>I'm new to OpenCV/EmguCV in C#. 
  I tried a tutorial (<a href="http://fewtutorials.bravesites.com/entries/emgu-cv-c/level-3---live-face-detection" rel="nofollow">http://fewtutorials.bravesites.com/entries/emgu-cv-c/level-3---live-face-detection</a>) and the video captureing with the webcam was easy. Now my problem:
  The tutorial was written for EmguCV 2.x. I'm using EmguCV 3.1 (I like to use the newest). Therefor I used the class <code>Mat</code> instead of the class <code>Image&lt;&gt;</code>. The class <code>Image&lt;&gt;</code> hasn't worked with <code>capture.QueryFrame();</code> 
  But when I come to face detection, the tutorial says I should use the classes <code>CascadeClassifier</code> and <code>DetectHaarCascade</code>. <code>CascadeClassifier</code> is accepted but <code>DetectHaarCascade</code> is not known. 
  In my 5-hour!! search I just found out, that DetectHaarCascade is obsolete but didn't find any methods replacing it exept <code>HaarCascade.Detect()</code> which is also not known.</p>
  
  <p>I have following assamblies:</p>
  
  <pre><code>using Emgu.CV;
  using Emgu.CV.Structure;
  using Emgu.Util;
  using Emgu.CV.CvEnum;
  </code></pre>
  
  <p>So, please help me: What is the replacement for DetectHaarCascade and how do I use it? Is there any tutorial for EmguCV 3.1? </p>
  
  <p>Thanks!!</p>