Illuminating image-based objects
Refereed conference paper presented and published in conference proceedings

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AbstractIn this paper we present a new scheme of data representation for image-based objects. It allows the illumination to be changed interactively without knowing any geometrical information (e.g. depth or surface normal) of the scene. But the resulting images are physically correct. The scene is first sampled from different view points and under different illuminations. By treating each pixel on the image plane as a surface element, the sampled images are used to measure the apparent BRDF of each surface element. Two compression schemes, spherical harmonics and discrete cosine transform, are proposed to compress the tabular BRDF data. Whenever the user changes the illumination, a certain number of views are reconstructed. The correct user perspective view is then displayed using the standard texture mapping hardware. Hence, the intensity, the type and the number of the light sources can be manipulated interactively.
All Author(s) ListWong TT, Heng PA, Or SH, Ng WY
Name of Conference5th Pacific Conference on Computer Graphics and Applications (Pacific Graphics 97)
Start Date of Conference13/10/1997
End Date of Conference16/10/1997
Place of ConferenceSEOUL
Country/Region of ConferenceSouth Korea
Pages69 - +
LanguagesEnglish-United Kingdom
KeywordsBRDF; holographic stereogram; illumination; image-based rendering; light field; Lumigraph; spherical harmonics
Web of Science Subject CategoriesComputer Science; Computer Science, Software Engineering

Last updated on 2021-16-09 at 01:34