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Image Sets under Directional Lighting: A Richer Representation of Cultural Heritage Objects

Start: Mar 11, 2015 05:30 PM

Location: G31 Foster Court, UCL

Normals Chopin

In this UCLDH Seminar talk, Lindsay MacDonald will discuss dome illumination systems and their use in the digitisation and display of cultural heritage objects. With a camera on a copystand one obtains a single image of an object with a fixed (usually diffuse) lighting geometry. In a dome illumination system, however, the same camera can be used to capture many different images in pixel register, each illuminated from a different direction.

This turns out to be a much richer representation than a single image, and has many applications in cultural heritage for the digitising and display of objects that are flattish with surface relief, such as coins, medals, fossils, rock art, incised tablets, bas reliefs, engravings, canvas paintings, etc. This talk will describe the UCL Dome system and show how the image sets can be used in three ways:

  1. visualisation by interactive movement of a virtual light source over the enclosing hemisphere
  2. 3D reconstruction of the object surface
  3. modelling of the specular highlights from the surface and hence realistic rendering

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Lindsay MacDonald is a Research Associate at the UCL Faculty of Engineering and a member of the 3DIMPact Research Group.

All are welcome, and there will be drinks following the talk. Please note that registration is required.

The notes from this seminar are available below: