Insights · Skin · Skin
Under-eye darkness (ΔL*)
Mean lightness of the infraorbital region minus mean lightness of the mid-cheek.
Confidence
Skin · lighting-dependent
Unit
ΔL*
Region
infraorbital vs mid-cheek
CI floor
—
canvas pixel analysis in CIE L*a*b* — see methodology
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Illustration · on your scan the same lines are drawn on your own photo
How to read it
Below the mean
Near the mean
Above the mean
Caveat
Strongly lighting-dependent (overhead light deepens it). Compare only across photos taken under the same light.
Why every value has an error bar
Every value Canthion reports carries a 1σ uncertainty propagated from MediaPipe Face Mesh's published accuracy (3.96% of inter-ocular distance mean absolute error per landmark, Kartynnik 2019). For a typical 300 px inter-pupil photo that is ≈12 px per landmark, which is why small ratios and angles get wide intervals. A number without an interval is a number pretending to be more precise than it is.
References
- Sano & Kawabata (2023). A computational approach to investigating facial attractiveness factors using geometric morphometric analysis and deep learning. Sci Rep 13:19797. doi.org/10.1038/s41598-023-47084-x
Related: how bone-level measurements are taken from a photo · methodology · all insights