Qualitative Spatio-Temporal Representation for Event Extraction from Video Data of Football Games

Masaki Sakaida, Takanori Kiyose, and Kazuko Takahashi


qualitative spatial reasoning, spatio-temporal representation, event extraction


We describe a qualitative representation of the spatial relations between extracted regions of video data, and discuss event occurrence based on this representation. We use video footage of football games and investigate a formalization to determine whether an event has occurred, specifically a pass or shot for a goal. We represent mereological and directional relations of regions in each frame based on extracted regions of objects, and determine event occurrence from the sequence of these relations. This qualitative spatio-temporal method reduces computational complexity and provides clear semantics defining an event.

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