Please use this identifier to cite or link to this item: https://dspace.crs4.it/jspui/handle/123456789/33
Title: A Practical Reflectance Transformation Imaging Pipeline for Surface Characterization in Cultural Heritage
Authors: Ciortan, Irina
Pintus, Ruggero
Marchioro, Giacomo 
Daffara, Claudia
Giachetti, Andrea
Gobbetti, Enrico
Keywords: I.4.1 [Image processing and Computer Vision]: Digitization and Image Capture—Imaging Geometry
Issue Date: Oct-2016
Publisher: the Eurographics Association
Project: info:eu-repo/grantAgreement/EC/H2020/665091/EU/Scan4Reco/Scan4Reco/ 
Abstract: 
We present a practical acquisition and processing pipeline to characterize the surface structure of cultural heritage objects. Using a free-form Reflectance Transformation Imaging (RTI) approach, we acquire multiple digital photographs of the studied object shot from a stationary camera. In each photograph, a light is freely positioned around the object in order to cover a wide variety of illumination directions. Multiple reflective spheres and white Lambertian surfaces are added to the scene to automatically recover light positions and to compensate for non-uniform illumination. An estimation of geometry and reflectance parameters (e.g., albedo, normals, polynomial texture maps coefficients) is then performed to locally characterize surface properties. The resulting object description is stable and representative enough of surface features to reliably provide a characterization of measured surfaces. We validate our approach by comparing RTI-acquired data with data acquired with a high-resolution microprofilometer.
URI: http://www.crs4.it/vic/cgi-bin/bib-page.cgi?id=%27Ciortan:2016:PRT%27
http://dspace.crs4.it/jspui/handle/123456789/33
Rights: the Eurographics Association
Appears in Collections:CRS4 publications

Files in This Item:
File Description SizeFormat
gch2016-rti.pdfMain article2 MBAdobe PDFView/Open
Show full item record

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.