Categorizing object-action relations from semantic scene graphs

— In this work we introduce a novel approach for detecting spatiotemporal object-action relations, leading to both, action recognition and object categorization. Semantic scene graphs are extracted from image sequences and used to find the characteristic main graphs of the action sequence via an exact graph-matching technique, thus providing an event table of the action scene, which allows extracting objectaction relations. The method is applied to several artificial and real action scenes containing limited context. The central novelty of this approach is that it is model free and needs a priori representation neither for objects nor actions. Essentially actions are recognized without requiring prior object knowledge and objects are categorized solely based on their exhibited role within an action sequence. Thus, this approach is grounded in the affordance principle, which has recently attracted much attention in robotics and provides a way forward for trial and error learning of ...

• Type: Journal
• Year: 2010
• Where: ICRA
• Authors: Eren Erdal Aksoy, Alexey Abramov, Florentin Wörgötter, Babette Dellen
• Keywords: Action Scenes, Action Sequence, ICRA 2010, Object-action Relations, Robotics