Maintaining knowledge about temporal intervals
Communications of the ACM
Coarse Qualitative Descriptions in Robot Navigation
Spatial Cognition II, Integrating Abstract Theories, Empirical Studies, Formal Methods, and Practical Applications
Spatio-Temporal Geographic Information Systems: A Causal Perspective
ADBIS '02 Proceedings of the 6th East European Conference on Advances in Databases and Information Systems
ER '02 Proceedings of the 21st International Conference on Conceptual Modeling
Modeling of Moving Objects in a Video Database
ICMCS '97 Proceedings of the 1997 International Conference on Multimedia Computing and Systems
Qualitative Spatial Reasoning with Conceptual Neighborhoods for Agent Control
Journal of Intelligent and Robotic Systems
Representing Spatial Activities by Spatially Contextualised Motion Patterns
RoboCup 2006: Robot Soccer World Cup X
Qualitative Spatial Scene Modeling for Ambient Intelligence Environments
ICIRA '08 Proceedings of the First International Conference on Intelligent Robotics and Applications: Part I
Representing Qualitative Trajectories by Autonomous Mobile Robots
Proceedings of the 2008 conference on Artificial Intelligence Research and Development: Proceedings of the 11th International Conference of the Catalan Association for Artificial Intelligence
Representing Relative Direction as a Binary Relation of Oriented Points
Proceedings of the 2006 conference on ECAI 2006: 17th European Conference on Artificial Intelligence August 29 -- September 1, 2006, Riva del Garda, Italy
Qualitative and quantitative representations of locomotion and their application in robot navigation
IJCAI'99 Proceedings of the 16th international joint conference on Artificial intelligence - Volume 2
Representing moving objects in computer-based expert systems: the overtake event example
Expert Systems with Applications: An International Journal
On generalizing orientation information in OPRAm
KI'06 Proceedings of the 29th annual German conference on Artificial intelligence
Searching for locomotion patterns that suffer from imprecise details
KI'10 Proceedings of the 33rd annual German conference on Advances in artificial intelligence
Exploiting qualitative spatial neighborhoods in the situation calculus
SC'04 Proceedings of the 4th international conference on Spatial Cognition: reasoning, Action, Interaction
A qualitative trajectory calculus and the composition of its relations
GeoS'05 Proceedings of the First international conference on GeoSpatial Semantics
Multi-granularity and metric spatial reasoning
Expert Systems with Applications: An International Journal
Hi-index | 12.05 |
The Qualitative Rectilinear Projection Calculus (QRPC), a new representation model based on planar trajectories, is presented in this work for describing qualitatively motion patterns. Several models have been developed for this purpose and by comparing them with our proposal we show that the proposed model results in an intuitive approach for representing, in any context, the kinematical behavior of two objects in motion on the plane through the possible relationships among the rectilinear projection of their trajectories. The paper is centered on the formal definition of the set of geometric relations in terms of the front-back and left-right dichotomies, and how by the composition of these relations, it can be possible enumerate an exhaustive set of qualitative states and the possible transitions among them. The complete iconic representation of the set of qualitative states defines the Conceptual Neighborhood Graph of the QRPC model. In order to illustrate how this qualitative representation can be used to analyze and describe the relative motion of two objects, some examples extracted from the traffic engineering field have been studied.