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Dr Joanna Isabelle Olszewska School of Computing and Engineering, University of Huddersfield, UK. VL 2011, 15.09.2011, Brighton, UK. Spatio-Temporal Visual.

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Presentation on theme: "Dr Joanna Isabelle Olszewska School of Computing and Engineering, University of Huddersfield, UK. VL 2011, 15.09.2011, Brighton, UK. Spatio-Temporal Visual."— Presentation transcript:

1 Dr Joanna Isabelle Olszewska School of Computing and Engineering, University of Huddersfield, UK. VL 2011, , Brighton, UK. Spatio-Temporal Visual Ontology Dr Joanna Isabelle Olszewska

2 © J. I. Olszewska Contents Ontology Definition Spatio-Temporal Visual Ontology (STVO) Motivation Concepts Relations Application: STVO-Coupled Active Contours Experiments Evaluation Conclusions 2 VL 2011, , Brighton, UK.

3 © J. I. Olszewska Ontology Definitions In Philosophy (IVth century BC) « study of being » In AI (1980’s) specific vocabulary used to describe a certain reality + a set of explicit assumptions regarding the meaning of the vocabulary In Computer Science (1993) « specification of a conceptualization » 3 VL 2011, , Brighton, UK.

4 © J. I. Olszewska Spatio-Temporal Visual Ontology Motivation mapping of low-level descriptor values to higher-level semantics bridging the gap between visual features and semantic knowledge 4 VL 2011, , Brighton, UK.

5 © J. I. Olszewska Spatio-Temporal Visual Ontology Concepts 5 VL 2011, , Brighton, UK.

6 © J. I. Olszewska Relations Spatial Topological relations: Region Connection Calculus (RCC-8) relations Directional relative postions: o’clock intra and inter-object relations Relative distances (close/far relations) Temporal Visual Spatio-Temporal Visual Ontology 6 RCC-8 topological relations O’clock inter-object spatial relations O’clock intra-object spatial relations VL 2011, , Brighton, UK.

7 © J. I. Olszewska Experiments STVO-Coupled Active Contours 7 VL 2011, , Brighton, UK.

8 © J. I. Olszewska STVO-Coupled Active Contours Evaluation Precision of detection Precision of answers 8 Frame 1216PACGACMTAC precision of detection 0%50%100% CVBASESpatial ontoVisual ontoSTVO precision of answers 50% 100% = # correct contours / # targets = # correct answers / # queries VL 2011, , Brighton, UK.

9 © J. I. Olszewska Conclusions Spatio-Temporal Visual Ontology (STVO) Granular conceptualization and a hierarchical representation of the visual observation domain Semantical characterization of each visual scene and its components (e.g. objects of interest) New sematically meanignful inter- and intra-object spatio-temporal relations Support of the reasoning about photomoetric, geometrical and spatio-temporal relations between and within the multiple observed objects or parts of tem for the effective interpretation of visual information. Application to Dynamic Visual Scene Analysis 9 VL 2011, , Brighton, UK.

10 Dr Joanna Isabelle Olszewska School of Computing and Engineering, University of Huddersfield, UK. Thank You VL 2011, , Brighton, UK. Spatio-Temporal Visual Ontology Contact Details Dr Ir Joanna Olszewska School of Computing and Engineering University of Huddersfield, Queensgate Huddersfield, HD1 3DH, United Kingdom


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