Paper Info
Title
New reflection transformation imaging methods for rock art and multiple-viewpoint display
Abstract
We offer two new methods of documenting and communicating cultural heritage information using Reflection Transformation Imaging (RTI). One imaging method is able to acquire Polynomial Texture Maps (PTMs) of 3D rock art possessing a large range of sizes, shapes, and environmental contexts. Unlike existing PTM capture methods requiring known light source positions, we rely on the user to position a handheld light source, and recover the lighting direction from the specular highlights produced on a black sphere included in the field of view captured by the camera. The acquisition method is simple, fast, very low cost, and easy to learn. A complementary method of integrating digital RTI representations of subjects from multiple viewpoints is also presented. It permits RTI examination "in the round" in a unified, interactive, image-based representation. Collaborative tests between Cultural Heritage Imaging, Hewlett- Packard Labs, and the UNESCO Prehistoric Rock-Art Sites in the Côa Valley, a World Heritage Site in Portugal, suggest this approach will be very beneficial when applied to paleolithic petroglyphs of various sizes, both in the field and in the laboratory. These benefits over current standards of best practice can be generalized to a broad range of cultural heritage material.
Year
DOI
Venue
2006
10.2312/VAST/VAST06/195-202
VAST
Keywords
Field
DocType
imaging method,rock art,acquisition method,cultural heritage imaging,reflection transformation imaging,rti examination,multiple-viewpoint display,complementary method,new method,broad range,new reflection transformation imaging,digital rti representation,world heritage site,best practice,field of view,cultural heritage,texture mapping
Field of view,Specular highlight,Texture mapping,Computer vision,Polynomial texture mapping,Computer graphics (images),Cultural heritage,Computer science,Viewpoints,Mobile device,Rock art,Artificial intelligence
Conference
ISBN
Citations 
PageRank 
3-905673-42-8
24
1.50
References 
Authors
5
4
Name
Order
Citations
PageRank
Mark Mudge1806.23
Tom Malzbender240939.12
Carla Schroer3483.22
Marlin Lum4483.22