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Summary: BEYOND THE NEUTRAL INTERFACE REFLECTION ASSUMPTION IN ILLUMINANT
COLOR ESTIMATION
Eva Eibenberger1,2,3
, Elli Angelopoulou1,3
1
Pattern Recognition Lab, University of Erlangen-Nuremberg, Germany
2
International Max Planck Research School for Optics and Imaging
3
Erlangen Graduate School in Advanced Optical Technologies (SAOT), Erlangen, Germany
{eva.eibenberger, elli.angelopoulou}@informatik.uni-erlangen.de
ABSTRACT
The neutral interface reflection (NIR) assumption is a widely ac-
cepted theory in computer vision. According to the NIR the color of
specularities of dielectric materials is the color of the incident illumi-
nation and the influence of the Fresnel reflectance is neglected. We
show, that there is a material- and geometry-dependent shift between
the color of the specularity and the color of the incident light due to
the Fresnel effect which for human skin can be up to approximately
5.8%. As the NIR concept is often the core idea of specularity-based
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