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Extracting Geometry from Digital Models in a Cultural Heritage Digital Library

Extracting Geometry from Digital Models in a Cultural Heritage Digital Library. Thomas L. Milbank Perseus Project, Tufts University tmilbank@perseus.tufts.edu. Introduction. Digital libraries can … disseminate objects “as is” through cataloged metadata

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Extracting Geometry from Digital Models in a Cultural Heritage Digital Library

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  1. Extracting Geometry from Digital Modelsin a Cultural Heritage Digital Library Thomas L. Milbank Perseus Project, Tufts University tmilbank@perseus.tufts.edu

  2. Introduction Digital libraries can … • disseminate objects “as is” through cataloged metadata • disseminate objects customized to the user through automated processes

  3. Models and libraries The treatment of models as immutable objects ... • leads to in toto retrieval • impacts library search results

  4. Paradigm: a search for column capitals

  5. Models as texts Digital model of Boston 07.1002, a relief from tomb G 2110 at Giza, ... rendered in an image rendered in XML 

  6. The Perseus document manager & X3D X3D encoding of tomb G 2110 The Boston 07.1002 “Transform” is mapped and indexed as “object” Index of elements/mappings 

  7. The Perseus document manager & X3D PDM references the index PDM opens the model and reads the sub-object(s) PDM processes the X3D fragment and outputs VRML for display in an HTML page

  8. Results of search for “Boston 07.1002” ... … include sub-object  instantiations 

  9. Implications for model design Need for well-defined and well-named geometry • Object-oriented modeling is suitable natively • Layer-oriented modeling is suitable with forethought

  10. Conclusions • XML processing techniques … • can be applied to digital models successfully • facilitate the identification of geometry incorporated into larger constructs • enable the extraction of sub-object geometry • The application of XML processing techniques establishes a framework for the integration of models with additional library services

  11. Visit the Perseus Digital Library at http://www.perseus.tufts.edu Thomas L. Milbank Perseus Project, Tufts University tmilbank@perseus.tufts.edu

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