Characterising polygons qualitatively


So far, we have analysed arrangements between disconnected intervals. Intervals can be considered as abstractions of objects, representing their intrinsic orientation, their extension seen from a particular viewpoint, or their direction of movement. The length of an interval may represent the length of the object, its speed, or the distance between two objects or components of one object. However, in order to describe the shape of single objects we need to consider arrangements of connected lines. That is, we are interested in describing the outlines of shapes, which constrain how objects are related to other objects and their environment.


Line Segment Reference Line Neighbourhood Graph Obtuse Angle Global Orientation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Deutscher Universitäts-Verlag | GWV Fachverlage GmbH, Wiesbaden 2007

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