Fig. 2. (A) 3D computer models obtained using different scanning techniques. For coarse alignment, three corresponding points on the surface of each model are marked. (B) The center point of the scan body is at the intersection between its axis and top plane. (C) The Euclidean distance between the center points of two scan bodies. (D) The angulation of scan bodies. (E) Detecting the edge of the scan body. (F) The rotation of one scan body in relation to the other one. (G) The vertical shift of the scan body.