public static CvRect[] LocateFaces(this IplImage img, FaceSearchWrapper.FaceSearch searcher, CvRect rectToLookin)
        {
            var frame = new Common.Frame(img);
            frame.MotionRectangles.Add(rectToLookin);
            var faces = searcher.SearchFace(frame.GetImage());

            var faceRects = from f in faces
                            select f.Bounds;

            return faceRects.ToArray();
        }