Specular Reflection vs. Radiant Glow
Light reflected from human facial skin consists of two components: diffuse subsurface scattering (producing healthy color and soft radiance) and specular Fresnel reflection from surface lipids (producing bright highlights).
Excessive sebum secretion in the T-zone (forehead, nose, chin) creates a continuous lipid film that intensifies localized specular highlights, resulting in an oily sheen.
Detection Algorithms in Vision AI
Dr Maher Vision AI v4.0 evaluates localized luminance peaks and highlight cluster density, distinguishing broad diffuse glow from concentrated specular oil glares.
Frequently Asked Questions
Why does my skin look shiny in photos but dry in person?
Camera flashes and directional smartphone lighting create harsh specular reflections on any natural skin oils, exaggerating the appearance of shine.