Visualising an Egyptian Artefact in 3D: Comparing RTI with Laser Scanning
3D Imaging Technology
Electronic Visualisation and the Arts London 2011 · Lindsay W. MacDonald
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About this episode
3D digital representations of an ancient Egyptian artefact were compared for their rendering of surface detail. Normals were generated by three methods: (1) point clouds from the Arius 3D colour scanner; (2) reflectance transform imaging (RTI); (3) photometric stereo. The latter two were constructed from sets of 64 digital images taken under directional lighting in a hemispherical dome. Analysis of the 3D surface normals of corresponding sections of each object indicated that the photometric stereo method produced the best resolution of spatial detail.