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.
Content
Author and article information
Contributors
Lindsay W. MacDonald
Conference
Publication date:
July
2011
Publication date
(Print):
July
2011
Pages: 155-162
Affiliations
[0001]Photogrammetry, 3D Imaging and Metrology Research Centre
Dept. of Civil, Environmental and Geomatic Engineering, University College London