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WSCG
2004

Properties of Three Shadows on a Plane

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Properties of Three Shadows on a Plane
We describe the geometrical properties of solid's shadows projected onto a flat plane by point-light sources. Even though the shape and position of each element are arbitrary and unknown, we indicate that there exists a certain constraint between three shadows on the plane; i.e., three cross points determined by pairs of tangential lines must sit on a straight line. This property is considered to be a derivation of epipolar geometry. However, the situation we treat is a special one in which an explicit feature can emerge. We also show the geometrical meaning of this property by invoking other properties. Keywords Epipolar Geometry, Shape from Silhouette, Shadow.
Toshio Moriya, Fumiko Beniyama, Kosei Matsumoto, T
Added 31 Oct 2010
Updated 31 Oct 2010
Type Conference
Year 2004
Where WSCG
Authors Toshio Moriya, Fumiko Beniyama, Kosei Matsumoto, Tsuyoshi Minakawa, Kei Utsugi, Haruo Takeda
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