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Extracting Geometry from Digital Models in a Cultural Heritage Digital Library Thomas L. Milbank Perseus Project, Tufts University

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Presentation on theme: "Extracting Geometry from Digital Models in a Cultural Heritage Digital Library Thomas L. Milbank Perseus Project, Tufts University"— Presentation transcript:

1 Extracting Geometry from Digital Models in a Cultural Heritage Digital Library Thomas L. Milbank Perseus Project, Tufts University

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 , 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 “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 ”... … include sub-object  instantiations 

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

10 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

11 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

12 Visit the Perseus Digital Library at Thomas L. Milbank Perseus Project, Tufts University


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