MPEG-7 based Multimedia Ontologies: Interoperability Support or Interoperability Issue? Wednesday 5 th of December, 2007 Oscar CelmaRapha.

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Presentation transcript:

MPEG-7 based Multimedia Ontologies: Interoperability Support or Interoperability Issue? Wednesday 5 th of December, 2007 Oscar CelmaRapha ë l Troncy Suzanne Little Roberto Garcia Chrisa Tsinaraki

Motivation Growing amount of digital multimedia content available on the Web Content difficult to search and reuse  Annotate multimedia content on the web

MPEG-7 and the Semantic Web MPEG-7: ISO Standard in : Hunter, MDS in RDFS Later on, link to the ABC upper ontology 2004: Tsinaraki et al., DS-MIRF model in OWL-DL 2005: Garcia and Celma, Rhizomik model Fully automatic translation of the whole standard 2007: Arndt et al., COMM Re-engineering MPEG-7 using DOLCE design patterns

MPEG-7 Based Ontologies HunterDS-MIRFRhizomikCOMM FoundationsABCNone DOLCE ComplexityOWL-FullOWL-DL CoverageMDS+VisualMDS+CSAllMDS+Visual Applications Digital Libraries Digital Right MM Analysis

Requirements [aceMedia, MMSEM XG] MPEG-7 compliance Support most descriptors (decomposition, visual, audio) Syntactic and Semantic interoperability Shared and formal semantics represented in a Web language (OWL, RDF/XML, RDFa, etc.) Separation of concerns Domain knowledge versus multimedia specific information Modularity Enable customization of multimedia ontology Extensibility Enable inclusion of further descriptors (non MPEG-7)

Common Scenario The "Big Three" at the Yalta Conference (Wikipedia)Big Three Localize a region (person) Annotate the content (interpretation) Winston Churchill, UK Prime Minister, Allied Forces, WWII Link to knowledge on the Web :Reg1 foaf:depicts dbpedia:WinstonChurchill dbpedia:Churchill rdfs:label "Winston Churchill" dbpedia:Churchill rdf:type foaf:Person Reg1

Hunter's MPEG-7 Ontology

DS-MIRF MPEG-7 Ontology

Rhizomik MPEG-7 Ontology

COMM: Fragment Identification

COMM: Region Annotation

Comparison Link with domain semantics Hunter: ABC model + mpeg7:depicts relationship DS-MIRF: Domain ontologies needs to subclass the general MPEG-7 categories Rhizomik: Use the mpeg7:semantic relationship COMM: Semantic Annotation pattern MPEG-7 coverage Hunter: extension of the MPEG-7 visual descriptors COMM:  Formalization of the context of the annotation  Representation of the method (algorithm) that provides the annotation

Comparison Modeling Decisions: DS-MIRF and Rhizomik: 1-to-1 translation from MPEG-7 to OWL/RDF Hunter: Simplification and link to the ABC upper model COMM: NO 1-to-1 translation  Need for patterns: use DOLCE, a well designed foundational ontology as a modeling basis Scalability: HunterDS-MIRFRhizomikCOMM Triples

Conclusion Advantages of having MPEG-7 based ontologies rather than plain XML Schema Similarities and differences: DS-MIRF and Rhizomik Hunter and COMM Towards an harmonization?