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Optical Engineering

Face relighting based on virtual irradiance sphere and reflection coefficient
Author(s): Heechul Han; Kwanghoon Sohn
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Paper Abstract

We present a novel method to estimate the light source direction and relight a face texture image of a single 3-D model under arbitrary unknown illumination conditions. We create a virtual irradiance sphere to detect the light source direction from a given illuminated texture image using both normal vector mapping and weighted bilinear interpolation. We then induce a relighting equation with estimated ambient and diffuse intensity. We provide the result of a series of experiments on light source estimation, relighting, and face recognition to show the efficiency and accuracy of the proposed method in restoring the shading and shadow areas of a face texture image. Our approach for face relighting can be used for illuminant-invariant face recognition applications.

Paper Details

Date Published: 1 February 2008
PDF: 8 pages
Opt. Eng. 47(2) 027204 doi: 10.1117/1.2857451
Published in: Optical Engineering Volume 47, Issue 2
Show Author Affiliations
Heechul Han, SAMSUNG Electronics Co., Ltd. (South Korea)
Kwanghoon Sohn, Yonsei Univ. (South Korea)

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