What could an ideal unit of measurement for Human Facial Features? The Facial Features largely vary with gender, age, genetic and climate. A careful observation of human skull can give the following insights.
- The least changed shape in human skull is eye socket (anatomically known as ‘Orbit’).
- The least changed dimension is the interocular distance.
- Jaw is in its peak shape during the most reproductive age. This is also the most changing shape on face.
- The face-width has less variation over age, in comparison to face-height.
Considering the above observations, Interocular distance is a good candidate for unit of measurement for structural analysis of face.
![](https://pinkmirror.com/blog/wp-content/uploads/2020/11/age-related-morphological-changes-of-skull.jpg)
Even though Interocular distance is a good candidate, is there any possibility of large variation of its measurements over gender, age, genetic and climate? The interocular distance can be further break down into ‘outer canthal distance’ , ‘interpupillary distance’ and ‘inner canthal distance’
![](https://pinkmirror.com/blog/wp-content/uploads/2020/11/interocular-distance.jpg)
The below figure shows that, inter canthal distance is one feature which has less change over the years of age progression.
![](https://pinkmirror.com/blog/wp-content/uploads/2020/11/Canthal-Distance-over-age.jpg)
The InterPupillary Distance is one feature that has no significant difference between males and females. The average InterPupillary Distance for males and females across different ethnicity is around 64mm.
IPD = InterPupillary Distance/64 is the standard used for measuring facial features from an image at PinkMirror Facial Aesthetics Studio.
The IPD is also subjected to photographic distortions. https://www.researchgate.net/publication/249562845_The_Non-Realistic_Nature_of_Photography_Further_Reasons_Why_Turner_Was_Wrong. Hence the selection of photographic equipment needed to be carefully considered.
Abnormal Inter Canthal Distances
For a well formed facial structure, the inter canthal distance is correlated with width of eye. If there is an imbalance in inter canthal distance, it can cause ‘Telecanthus’ or ‘Orbital hypertelorism’
![](https://pinkmirror.com/blog/wp-content/uploads/2020/11/eye-orbital-features.jpg)
Distinctive face features of a child with Fetal Alcohol Syndrome who have brain damage and resulted low intelligence.
![](https://pinkmirror.com/blog/wp-content/uploads/2020/11/Photo_of_baby_with_FAS.jpg)
![](https://pinkmirror.com/blog/wp-content/uploads/2020/11/Facial-Features-for-FAS.jpg)
The genetical deformity of orbital area can be further studied in the below link.
https://onlinelibrary.wiley.com/doi/10.1002/ajmg.a.32597
Word of Caution
This a study based on external sources. This is neither final nor an official one. Please use the information presented here at your discretion.
3 replies on “Human Face and unit of measurement”
27 in December here
Hi i am 58 .
I hope this is okay I’m going to post my measurements and maybe you can analyze them I will also post a picture.
# Face structure analysis:
Pan Angle: 0.29167053
Roll Angle: -3.2929
Tilt Angle: -10.168878
Face elements coordinates:
Left eye: x = 343.41, y = 543.56, z = 0.0
Right eye: x = 499.24, y = 536.89, z = 0.77
Left of left eyebrow: x = 292.18, y = 502.97, z = 7.27
Right of left eyebrow: x = 381.41, y = 509.36, z = -33.55
Left of right eyebrow: x = 455.2, y = 508.52, z = -33.06
Right of right eyebrow: x = 549.72, y = 493.2, z = 8.2
Midpoint between eyes: x = 420.7, y = 541.38, z = -30.23
Nose tip: x = 430.5, y = 631.69, z = -58.53
Upper lip: x = 431.58, y = 687.33, z = -16.48
Lower lip: x = 435.19, y = 731.25, z = 1.37
Mouth left: x = 376.47, y = 703.84, z = 24.74
Mouth right: x = 492.84, y = 699.35, z = 25.55
Mouth center: x = 432.78, y = 706.01, z = -2.27
Nose bottom right: x = 469.67, y = 645.25, z = -2.64
Nose bottom left: x = 391.52, y = 645.29, z = -2.55
Nose bottom center: x = 430.62, y = 656.95, z = -22.05
Left eye top boundary: x = 340.95, y = 527.52, z = -10.6
Left eye right corner: x = 373.98, y = 549.38, z = 0.76
Left eye bottom boundary: x = 340.63, y = 555.53, z = 0.2
Left eye left corner: x = 312.44, y = 540.55, z = 13.17
Right eye top boundary: x = 499.42, y = 520.85, z = -9.82
Right eye right corner: x = 528.81, y = 533.71, z = 14.26
Right eye bottom boundary: x = 501.22, y = 549.75, z = 1.14
Right eye left corner: x = 466.17, y = 544.95, z = 1.19
Left eyebrow upper midpoint: x = 334.73, y = 491.92, z = -24.77
Right eyebrow upper midpoint: x = 501.97, y = 487.03, z = -23.89
Left ear tragus: x = 240.77, y = 554.47, z = 188.77
Right ear tragus: x = 591.84, y = 564.8, z = 190.87
Forehead glabella: x = 418.98, y = 509.8, z = -38.46
Chin gnation: x = 438.15, y = 789.47, z = 33.13
Chin left gonion: x = 308.32, y = 697.91, z = 151.71
Left of left eyebrow: x = 559.3, y = 691.87, z = 152.35
LEFT CHEEK CENTER: x = 324.44, y = 638.84, z = 29.37
RIGHT CHEEK CENTER: x = 532.45, y = 632.03, z = 30.49
# Detection quality statistics:
Detection confidence: 85.7%
Landmarking confidence: 61.73%