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ECCV
2002
Springer

Estimation of Illuminant Direction and Intensity of Multiple Light Sources

15 years 23 days ago
Estimation of Illuminant Direction and Intensity of Multiple Light Sources
This paper presents a novel scheme for locating multiple light sources and estimating their intensities from a pair of stereo images of a sphere. No prior knowledge of the location and radius of the sphere is necessary. The sphere surface is not assumed to be a pure Lambertian surface, instead, it has both Lambertian and specular properties. The light source locating algorithm is based on the fact that the Lambertian intensity is not dependent on the direction of view point, while the specular intensity is highly dependent on the direction of the view point. From this fact, we can use a pair of stereo images whose view point changes can be utilized to separate the image of the sphere into two images, one with Lambertian intensities, and the other with specular intensities. The specular image is used to nd the directions of the light sources, and then Lambertian image model is used to nd the intensities of the light sources. Experiments on both synthetic and real images show that the sc...
Wei Zhou, Chandra Kambhamettu
Added 16 Oct 2009
Updated 16 Oct 2009
Type Conference
Year 2002
Where ECCV
Authors Wei Zhou, Chandra Kambhamettu
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