Please report any queries concerning the funding data grouped in the
sections named
"Externally Awarded"
or
"Internally Disbursed"
(shown on the profile page) to your Research Finance Administrator.
Your can find your Research Finance Administrator at http://www.ucl.ac.uk/finance/research/post_award/post_award_contacts.php
by entering your department
Please report any queries concerning the student data shown on the
profile page to:
Email: portico-services@ucl.ac.uk
Help Desk: http://www.ucl.ac.uk/ras/portico/helpdesk
Email: portico-services@ucl.ac.uk
Help Desk: http://www.ucl.ac.uk/ras/portico/helpdesk
Publication Detail
Modelling the appearance of heritage metallic surfaces
-
Publication Type:Conference
-
Authors:MacDonald LW, Hindmarch J, Robson S, Terras M
-
Publisher:ISPRS
-
Publication date:2014
-
Pagination:371, 377
-
Published proceedings:ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
-
Volume:XL-5
-
Name of conference:ISPRS
-
Conference place:Riva del Garda, Italy
-
Conference start date:01/06/2014
-
Conference finish date:01/06/2014
-
Keywords:Cultural Heritage, Imaging, 3D model, Photogrammetry, Photometric stereo, Rendering, Specularity
-
Addresses:UCL
Abstract
Polished metallic surfaces exhibit a high degree of specularity, which makes them difficult to reproduce accurately. We have applied two different techniques for modelling a heritage object known as the Islamic handbag. Photogrammetric multi-view stereo enabled a dense point cloud to be extracted from a set of photographs with calibration targets, and a geometrically accurate 3D model produced. A new method based on photometric stereo from a set of images taken in an illumination dome enabled surface normals to be generated for each face of the object and its appearance to be rendered, to a high degree of visual realism, when illuminated by one or more light sources from any angles. The specularity of the reflection from the metal surface was modelled by a modified Lorentzian function.
› More
search options
UCL Researchers