Principles of Program Analysis
Principles of Program Analysis
Spatial Abstraction: Aspectualization, Coarsening, and Conceptual Classification
Proceedings of the international conference on Spatial Cognition VI: Learning, Reasoning, and Talking about Space
A formal model of reliable sensor perception
EuroSSC'10 Proceedings of the 5th European conference on Smart sensing and context
The role of situation awareness in assuring safety of autonomous vehicles
SAFECOMP'06 Proceedings of the 25th international conference on Computer Safety, Reliability, and Security
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A safe (i.e. collision-free) and efficient movement of a mobile autonomous system requires a correct assessment of the vehicles@? environment. In many systems, the spatial context is represented by means of an occupancy grid, that is, a partitioning of a two-dimensional area into finitely many cells where each cell maintains a probabilistic estimation of being occupied by some object. Often, this representation is complemented by dedicated information regarding the detected objects. We instantiate a generic framework based on a formal notion of abstraction for characterising the safety and precision of such kind of spatial context models. In this approach, the sensory perception corresponds to an abstraction function, and the concretisation function reflects the loss of information with respect to the real environment. We show that this method is able to derive both qualitative and quantitative measures for different variants of spatial context models.