Face Recognition using Kinect

Is there any algorithm face recognition using the points getting from the "Face Tracking Basics" given by Microsoft? 

Now I am using the below code. But I am not getting a correct value

for (int i = 0; i < this.facePoints.Count - 1; i++){  Total += ((facePoints[i].Y + facePoints[i+1].Y) / (facePoints[i].Y -facePoints   [i+1].Y)); }