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Table 8 Anchor anatomical points and descriptions

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

NoAnchor Landmarks3D NotationDescription
1Endocanthion leftenlLeft most medial point of the palpebral fissure, at the inner commissure of the eye
2Exocanthion leftexlLeft most lateral point of the palpebral fissure, at the outer commissure of the eye
3Exocanthion rightexrRight most lateral point of the palpebral fissure, at the outer commissure of the eye
4Endocanthion rightenrRight most medial point of the palpebral fissure, at the inner commissure of the eye
5SellionseDeepest midline point of the nasofronal angle
6PronasaleprThe most anteriorly protruded point of the apex nasi
7subnasalesuMedian point at the junction between the lower border of the nasal septum and the philtrum area
8Alare leftallLeft most lateral point on the nasal ala
9Alare rightalrRight most lateral point on the nasal ala
10Cheilion leftchlLeft outer corners of the mouth where the outer edges of the upper and lower vermilions meet
11Cheilion rightchrRight outer corners of the mouth where the outer edges of the upper and lower vermilions meet
12Labiale superiuslsMidpoint of the vermilion border of the upper lip
13Labiale inferiusliMidpoint of the vermilion border of the lower lip
14GnathiongnMedian point halfway between pogonion and menton
15Obelion leftoblLeft median point where the sagittal suture intersects with a transverse line connecting parietal foramina
16Obelion rightobrRight median point where the sagittal suture intersects with a transverse line connecting parietal foramina