| 1. |
- Kootstra, Gert, 1978-, et al.
(författare)
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Prediction of Human Eye Fixations using Symmetry
- 2009
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Ingår i: Proceedings of the 31st Annual Conference of the Cognitive Science Society (CogSci09). - : Cognitive Science Society. - 9780976831853 ; , s. 56-61
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Konferensbidrag (refereegranskat)abstract
- Humans are very sensitive to symmetry in visual patterns. Reaction time experiments show that symmetry is detected and recognized very rapidly. This suggests that symmetry is a highly salient feature. Existing computational models of saliency, however, have mainly focused on contrast as a measure of saliency. In this paper, we discuss local symmetry as a measure of saliency. We propose a number of symmetry models and perform an eye-tracking study with human participants viewing photographic images to test the models. The performance of our symmetry models is compared with the contrast-saliency model of Itti, Koch and Niebur (1998). The results show that the symmetry models better match the human data than the contrast model, which indicates that symmetry can be regarded as a salient feature.
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| 2. |
- Montebelli, Alberto, et al.
(författare)
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Embodied anticipation for swift re-adaptation in neurocomputational cognitive architectures for robotic agents
- 2009
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Ingår i: Proceedings of the 31th Annual Conference of the Cognitive Science Society. - Austin : Cognitive Science Society, Inc.. - 9780976831853 ; , s. 3082-3087
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Konferensbidrag (refereegranskat)abstract
- The coupling between a body (in an extended sense that encompasses both neural and non-neural dynamics) and its environment is here conceived as a critical substrate for cognition. We propose and discuss the plan for a neurocomputational cognitive architecture for robotic agents, so far implemented in its minimalist form for supporting the behavior of a simple simulated agent. A non-neural internal bodily mechanism (crucially characterized by a time scale much slower than the normal sensory-motor interactions of the robot with its environment) extends the cognitive potential of a system composed of purely reactive parts with a dynamic action selection mechanism and the capacity to integrate information over time. The same non-neural mechanism is the foundation for a novel, minimalist anticipatory architecture, capable of swift re-adaptation to related yet novel tasks.
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| 3. |
- Morse, Anthony F., et al.
(författare)
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Action, Detection, and Perception : A Computational Model of the Relation Between Movement and Orientation Selectivity in the Cerebral Cortex
- 2009
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Ingår i: Proceedings of the Thirty-First Annual Conferenceof theCognitive Science Society. - : Cognitive Science Society, Inc.. - 9780976831853 ; , s. 585-590
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Konferensbidrag (refereegranskat)abstract
- A fundamental tenet of enactive theories of cognition states that action is a necessary prerequisite to perception. In this paper we review the basis for this assumption and, with the help of a computational model of the famous Held and Hein kitten experiments, challenge the necessity of movement in subsequent detection. In normal development action does play an important role in setting up detection, but we aim here to widen our conceptions and consider the effect of correlations between non-motoric events.
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| 4. |
- Svensson, Henrik, et al.
(författare)
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Representation as Internal Simulation : A Minimalistic Robotic Model
- 2009
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Ingår i: Proceedings of the Thirty-First Annual Conference of the Cognitive Science Society. - : Cognitive Science Society, Inc.. - 9780976831853 ; , s. 2890-2895
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Konferensbidrag (refereegranskat)abstract
- Embodied cognition theorists have in recent years proposed that a cognitive agent's "representations" or "inner world" can at least partly be constituted by internal emulations or simulations of its sensorimotor interaction with the world, i.e. covert perception and action. This paper recapitulates some of the empirical evidence, distinguishes between implicit, internal and external anticipation, and discusses possible neural correlates. Furthermore a robotic neurocomputational model of external anticipation is presented and analyzed.
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