will be helpful for those in need In the Kinect v2, Microsoft increased the field of view and removed the tilt motor; so it's not possible to adjust the elevation angle anymore. But the good news is that with the expanded field of view, you can see as much as the Kinect 1 without having to move the sensor. Look at this article, there is a table that clearly shows that Kinect 2 has no tilt motor: http://zugara.com/how-does-the-kinect-2-compare-to-the-kinect-1.
Another function useful than Elbow in finding k-clusters
wish helps you The "Elbow" is not even well defined. So how can it be reliable? You can "normalize" the values by the expected dropoff from splitting the data into k clusters and it will become a bit more readable. Unfortunately, I forgot the exact name of that.Calinski and Harabasz (1974) variance ratio criterion? If I recall the name correctly, that is essentially a rescaled version that makes much more sense.