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Reflectance Transformation Imaging (RTI) System for Ancient Documentary Artefacts � 12-month project funded by the Arts and Humanities Enhancement for Impact (DEDEFI) scheme � http://www.southampton.ac.uk/archaeology/acrg/acrg_research_DEDEFI.html � University of Southampton and University of Oxford � Development of a more portable, low cost and quick capture system for surface data (textual and other archaeological) � Commitment to opening digital access to cultural heritage: results made publicly available through development and use of open source software Developing A Reflectance Transformation Imaging System for Inscription Documentation. Digital Classicist 03-06-2011, ICS
Reflectance Transformation Imaging � Uses conventional raking light photography � Digital images taken of inscribed surface with a camera in a fixed position and illumination applied from different angles � Multiple captures are combined in order to: � produce interactive, relit records of the surface for examination of artefacts � Improved visualisation � Legibility � Materiality � First algorithm for photo amalgamation developed by Tom Malzbender of HP labs in 2001, referred to as Polynomial Texture Mapping (PTM) Developing A Reflectance Transformation Imaging System for Inscription Documentation. Digital Classicist 03-06-2011, ICS
Page 1 and 2: Developing a Reflectance Transforma
Page 3 and 4: Methods and problems of artefact do
Page 5 and 6: Shadow Stereo: Vindolanda stilus ta
Page 7 and 8: Developing A Reflectance Transforma
Page 9 and 10: Key: yellow: highlight Developing A
Page 11 and 12: Shadow Stereo: Vindolanda stilus ta
Page 13: Developing A Reflectance Transforma
Page 17 and 18: RTI setups 1. Lighting dome RTI �
Page 19 and 20: Dome RTI system specifications �
Page 21 and 22: RTI in tandem with flatbed scanning
Page 23 and 24: H-RTI in museum and field contexts
Page 25 and 26: H-RTI versatility H-RTI setup in Ä
Page 27 and 28: H-RTI capture and processing Develo
Page 29 and 30: RTIViewer � Developed by Gianpaol
Page 31 and 32: Default Diffuse Gain Specular enhan
Page 33 and 34: 1. Relief-carved proto-writing/art
Page 35 and 36: Normal rendering settings can help
Page 37 and 38: Classical case studies � Reading
Page 39 and 40: 1. Lead curse tablet from Uley �
Page 41 and 42: 2. Vindolanda stilus Tablet � Dom
Page 43 and 44: Summing up � Methods and problems
Page 45: Acknowledgements � AHRC DEDFI;

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