Rich Semantics for Interactive 3D Models of Cultural Artifacts
Leslie F. Sikos, Ph.D. Flinders University, Australia
MTSR 2016, 23 Nov 2016 Göttingen, Germany
Rich Semantics for 3D Models
• Interactive 3D Applications
• Rationale
• 3D Ontologies: A Short History
• 3D Modeling Ontology
– Development
– Applications
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Outline
Interactive 3D Applications
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Virtual Museum – 2.5D, No 3D Models
The British Museum (Google Arts & Culture)
Interactive 3D Applications
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3D Models with ROIs
The British Museum (Sketchfab)
Interactive 3D Applications
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Interactive 3D Models
Smithsonian X 3D
Rationale
• Modeled or 3D scanned model in VRML or PLY
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Unstructured 3D Models
Strengths
– Representation of
geometry and
properties
– Visualization
Weaknesses
– No semantics
– Automated processing
is difficult and
inefficient
Rationale
• 3D models in X3D
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Semi-Structured 3D Models
– Machine-processable
– Not machine-interpretable
Example. The permissible values of directional
light intensity are real numbers between 0 and 1.
Rationale
• For example, a X3D model described
with domain ontology terms
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Structured 3D Models
– Accurate description with semantics
– Efficient indexing and retrieval, related terms
– Machine-processability and -interpretability,
intelligent processing via reasoning
3D Ontologies
• OntologyX3D (2004)
• RDFS mapping of X3D (2006)
• Common Shape Ontology (2007)
• OWL mapping of X3D (2012)
• Kinect Ontology (2013)
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A Brief History
The 3D Modeling Ontology
3D Modeling Ontology: OWL 2 mapping
of entire X3D v3.3 complemented by
terms from the 3D modeling industry not
covered by the X3D standard (ISO/IEC
19775, 19776, and 19777)
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A Novel 3D Ontology
The 3D Modeling Ontology
• Namespace structure with versioning
support
• Transparent translation from X3D’s XML
vocabulary to OWL 2 is not optimal
• Property relations are not standardized
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Modeling Challenges
The 3D Modeling Ontology
• New concept and role hierarchy
• De facto standard terms reused as per
Semantic Web best practices
• Resolved conceptual ambiguity and
homonymous role naming issues
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Addressing Issues
The 3D Modeling Ontology
• Ambiguous properties, e.g., bottom
–bottom object property of a
cubemap: cubemap bottom texture –bottom datatype property of a
cone: cone bottom cap is created?
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Addressing Issues (Continued)
The 3D Modeling Ontology
• Semantically enriched 3D cultural
heritage models, virtual museums
• Engineering
• Medical training
• Entertainment
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Potential Applications
The 3D Modeling Ontology
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Application Example
Semantic enrichment
of a 3ds Max ancient
Greek vase model
with structured
description and LOD
The 3D Modeling Ontology
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Application Example
The 3D Modeling Ontology
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Application Example (Continued)
The 3D Modeling Ontology
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Application Example (Continued)
The 3D Modeling Ontology
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Application Example (Continued)
The 3D Modeling Ontology
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Application Potential
• Not only annotation and indexing
• Reasoning over 3D models, e.g.,
–Differentiate between ancient
Attican and Apulian red-figure vases
–Compare ancient vases by volume
Rich Semantics for 3D Models Conclusions
• Semantically enriched 3D models can be used
for reasoning intelligent 3D applications
• The 3D Modeling Ontology: The first 3D
ontology that covers the entire X3D standard
and provides a comprehensive coverage of
terms from the 3D modeling industry
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Thank you.
Questions?