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A semantic based framework for
managing, searching and retrieving 3D
                           resources



             ...
AIM@SHAPE main achievements
Resources (data repositories) and knowledge have been
integrated into a unified Digital Shape ...
Technological achievements

Digital Shape Workbench (DSW)
       knowledge management system & services
       searching a...
DSW publicly available content
Shape Repository
       Over 1000 models (1800000 visits, 85000 model downloads)
       A l...
DSW Knowledge Infrastructure Design




 VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications...
DSW Knowledge Infrastructure
Ontology Server
    The role of the Ontology Server is to integrate the
    SSE, the Inferenc...
Knowledge base content
The Ontology and Metadata Repository contains
metadata for
    1000+ models,
    80+ tools/software...
Common Shape Ontology




                                                                    CSO: over 2500 instances
VSM...
Shape Representation class hierarchy




 VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Application...
Domain ontologies
Virtual Humans ontology (VHO)
Shape Acquisition and Processing ontology
(SAP)
Product Design ontology (P...
Browsing-Searching




VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
Shape Repository




                      Common Shape Ontology
VSMM 09, Workshop on 3D Knowledge Technologies for Cultur...
Variety of models




VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
Shape Repository


                                                          Range images                         Raw




...
Shape Repository




                                                                               Metadata


VSMM 09, Wo...
Shape Repository




                     Download / Visualization Features




VSMM 09, Workshop on 3D Knowledge Technolo...
Example Scenario

Physical
                                • Acquisition
 Digital                        • Reconstruction
...
Insertion into the Shape Repository




VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications,...
Second example scenario




VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 20...
Geometry-based Search Engine

Goal: to search the Shape Repository of the
DSW according to geometric similarity




   VSM...
Overall Functionalities
The geometric similarity between shapes is evaluated as a distance between
descriptions of the sha...
Comparison methodologies
Five comparison methodologies
    Structural descriptors
     1. matching algorithm for attribut...
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A semantic-based framework for managing, searching and retrieving 3D resources - Part 2

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A semantic-based framework for managing,
searching and retrieving 3D resources - Part 2. Presentation at VSMM09 Workshop on 3D Knowledge Technologies for Cultural Heritage Applications.

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A semantic-based framework for managing, searching and retrieving 3D resources - Part 2

  1. 1. A semantic based framework for managing, searching and retrieving 3D resources Marios Pitikakis CERETETH and University of Thessaly Chiara Catalano IMATI-CNR
  2. 2. AIM@SHAPE main achievements Resources (data repositories) and knowledge have been integrated into a unified Digital Shape Workbench (DSW) interface. All components are linked through ontological structures (“knowledge technologies for shapes”). Main services supported: uploading of resources (models, tools, bibliographic references etc); advanced searching (SSE & GSE), browsing and downloading resources; management of resource metadata (i.e. insert/edit/delete metadata); management and maintenance of ontologies. VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  3. 3. Technological achievements Digital Shape Workbench (DSW) knowledge management system & services searching and browsing Resources Knowledge • shapes/models • domain and common ontologies • tools/software • metadata for models & tools • publications • glossary VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  4. 4. DSW publicly available content Shape Repository Over 1000 models (1800000 visits, 85000 model downloads) A lot of high quality models scanned with laser scanners Tool repository 82 software tools or libraries Digital library 2821 references in the field Glossary (372 terms) Shape ontologies 5 ontologies defined (2 common ontologies and 3 domain ontologies) Publications 350 scientific papers, books, special issues People and Institutions 13 partners, 101 researchers, 82 phD students involved 42 Network Interested Researchers’ Group (NIRG) members 31 Network Industry Group (NIG) members VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  5. 5. DSW Knowledge Infrastructure Design VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  6. 6. DSW Knowledge Infrastructure Ontology Server The role of the Ontology Server is to integrate the SSE, the Inference Engine and the OMR. Ontology and Metadata Repository (OMR) The OMR is an ontology management system and constitutes the knowledge base back-end of the DSW. Semantic Search Engine (SSE) Inference Engine (RacerPro v1.9) Several protocols and APIs VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  7. 7. Knowledge base content The Ontology and Metadata Repository contains metadata for 1000+ models, 80+ tools/software, 220+ instances for Users and Institutions, 3500+ context-dependent instances in the domain and common ontologies. This large knowledge base provides a measure of the scalability of the DSW infrastructure. It has also provided a solid test base for the evaluation of the efficiency of the SSE. VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  8. 8. Common Shape Ontology CSO: over 2500 instances VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  9. 9. Shape Representation class hierarchy VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  10. 10. Domain ontologies Virtual Humans ontology (VHO) Shape Acquisition and Processing ontology (SAP) Product Design ontology (PDO) A large number of instances have been added VHO: over 200 SAP: over 100 PDO: over 150 Tutorials of the ontologies can be found in the DSW web pages. VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  11. 11. Browsing-Searching VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  12. 12. Shape Repository Common Shape Ontology VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  13. 13. Variety of models VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  14. 14. Shape Repository Range images Raw Quad Uniform Groups, and sub-group levels VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  15. 15. Shape Repository Metadata VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  16. 16. Shape Repository Download / Visualization Features VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  17. 17. Example Scenario Physical • Acquisition Digital • Reconstruction Geometry • Processing • Structuring Structure Semantic Bimba con nastrino VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  18. 18. Insertion into the Shape Repository VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  19. 19. Second example scenario VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  20. 20. Geometry-based Search Engine Goal: to search the Shape Repository of the DSW according to geometric similarity VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  21. 21. Overall Functionalities The geometric similarity between shapes is evaluated as a distance between descriptions of the shape that capture relevant properties of the shape The main ingredients are Tools for computing shape descriptors Tools for computing distances between shape descriptors (comparison methodologies) Tools for computing shape descriptors and for computing distances between shape descriptors are implemented as stand-alone tools that can be plugged into the GSE The GSE works with different matching criteria depending on the shape descriptors and the comparison methodologies available (e.g. global or partial matching) VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009
  22. 22. Comparison methodologies Five comparison methodologies  Structural descriptors 1. matching algorithm for attributed directed graphs 2. matching algorithm for directed graphs  Topological descriptor 1. matching algorithm based on the Matching distance 2. matching algorithm based on the Hausdorff distance  Geometric descriptor 1. Euclidean distance between feature vectors VSMM 09, Workshop on 3D Knowledge Technologies for Cultural Heritage Applications, 12 Sept. 2009

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