A fast method of lighting estimate using multi-linear algebra

Authors:
Yuequan Luo;Guangda Su
Affiliations:
The State Key Laboratory of Intelligent Technology and System, Electronic Engineering Department, Tsinghua University, Beijing, China;The State Key Laboratory of Intelligent Technology and System, Electronic Engineering Department, Tsinghua University, Beijing, China
Venue:
SINOBIOMETRICS'04 Proceedings of the 5th Chinese conference on Advances in Biometric Person Authentication
Year:
2004

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Abstract

Natural facial images are the composite consequence of multiple factors and illumination is an important one In many situations, we must normalize the facial image's illumination or simulate the similar lighting condition; therefore, accurate estimation of the facial image's lighting is necessary and can help get a good result Because of its richer representational power, multi-linear algebra offers a potent mathematical framework for analyzing the multifactor structure of image ensembles We apply multi-linear algebra to obtain a parsimonious representation of facial image ensembles which separates the illumination factor from facial images With the application of multi-linear algebra, we can avoid not only the use of 3D face model, but also that of the complicated iterative algorithm, thus we obtain a fast and simple method of lighting estimation.