| Title: | Properties of three shadows on a plane |
| Authors: | Takeda, Haruo Moriya, Toshio Beniyama, Fumiko Matsumoto, Kosei Minakawa, Tsuyoshi Utsugi, Kei |
| Citation: | WSCG '2004: Posters: The 12-th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision, 2.-6. February 2004, Plzen, p. 113-116. |
| Issue Date: | 2004 |
| Publisher: | UNION Agency |
| Document type: | konferenční příspěvek conferenceObject |
| URI: | http://wscg.zcu.cz/wscg2004/Papers_2004_Poster/L02.pdf http://hdl.handle.net/11025/952 |
| ISBN: | 80-903100-6-0 |
| Keywords: | epipolární geometrie;stíny těles;3D rozpoznávání obrazu |
| Keywords in different language: | epipolar geometry;solid shadows;3D image recognition |
| Abstract: | 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. |
| Rights: | © UNION Agency |
| Appears in Collections: | WSCG '2004: Posters |
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