Cultural Heritage Imaging : Featured Publications

Featured Publication:

"Reflection Transformation Imaging and
Virtual Representations
of Coins from the
Hospice of the Grand St. Bernard"

Authors : Mark Mudge+, Jean-Pierre Voutaz*, Carla Schroer+ Marlin Lum+

+Cultural Heritage Imaging, San Francisco, California USA
* Congregation of the Grand St. Bernard, Switzerland

Presented at: VAST 2005
The 7th International Symposium on Virtual Reality,
Archaeology and Cultural Heritage

VAST 2005 Editors: M. Mudge, N.Ryan, R. Scopigno

Julian Star with Specular Enhancement

Abstract

Reflection transformation imaging offers a powerful new method of documenting and communicating numismatic cultural heritage information. The challenges of documenting numismatic material will be examined along with the limitations of traditional documentary techniques. Previous uses of structured light scanning and PTMs in numismatic documentation are reviewed and evaluated. A novel, low cost method for capturing PTMs at remote locations and subsequent data processing operations is described. Reflection transformation imaging is shown to capture more complete documentation than traditional photographic methods and communicate this information with ease through digital media. The advantages of interactive relighting of numismatic PTM images in conjunction with enhancement operations are explored along with the potential of informed choice of the most information rich illumination directions. Advantages of joint capture of structured light and PTMs are examined including the inherent registration of range and normal data, using range and normal information together to improve 3D position accuracy, and the enhanced evidentiary reliability that results.

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	Paper (604 KB PDF)