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Table 8 Anchor anatomical points and descriptions

From: 3-Dimensional facial expression recognition in human using multi-points warping

No Anchor Landmarks 3D Notation Description
1 Endocanthion left enl Left most medial point of the palpebral fissure, at the inner commissure of the eye
2 Exocanthion left exl Left most lateral point of the palpebral fissure, at the outer commissure of the eye
3 Exocanthion right exr Right most lateral point of the palpebral fissure, at the outer commissure of the eye
4 Endocanthion right enr Right most medial point of the palpebral fissure, at the inner commissure of the eye
5 Sellion se Deepest midline point of the nasofronal angle
6 Pronasale pr The most anteriorly protruded point of the apex nasi
7 subnasale su Median point at the junction between the lower border of the nasal septum and the philtrum area
8 Alare left all Left most lateral point on the nasal ala
9 Alare right alr Right most lateral point on the nasal ala
10 Cheilion left chl Left outer corners of the mouth where the outer edges of the upper and lower vermilions meet
11 Cheilion right chr Right outer corners of the mouth where the outer edges of the upper and lower vermilions meet
12 Labiale superius ls Midpoint of the vermilion border of the upper lip
13 Labiale inferius li Midpoint of the vermilion border of the lower lip
14 Gnathion gn Median point halfway between pogonion and menton
15 Obelion left obl Left median point where the sagittal suture intersects with a transverse line connecting parietal foramina
16 Obelion right obr Right median point where the sagittal suture intersects with a transverse line connecting parietal foramina