code: public Point getMotionCog() {
  		Point cog = algorithm.getCog();
  		if (cog == null) {
  			// detectorAlgorithm hasn't been called so far - get image center
  			int w = webcam.getViewSize().width;
  			int h = webcam.getViewSize().height;
  			cog = new Point(w / 2, h / 2);
  		}
  		return cog;
  	}
docs: Get motion center of gravity. When no motion is detected this value points to the image
  center.
  
  @return Center of gravity point