Figure 1: Landmarks location.
From: A novel three-dimensional smile analysis based on dynamic evaluation of facial curve contour
Affixing 20–26 reflective markers on the facial surface along with the cheekbone-maxilla-nasolabial curve at 0.8 cm interval evenly. The number of landmarks varied with the facial size and the length of the curve. The three-dimensional coordinates of markers were translated in a local coordinate system created by four head landmarks and subsequently exported. The landmark locations under (a) static, (b) smile and (c) laugh condition were hereby shown.
