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| Titel |
An approach to computing direction relations between separated object groups |
| VerfasserIn |
H. Yan, Z. Wang, J. Li |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 6, no. 5 ; Nr. 6, no. 5 (2013-09-17), S.1591-1599 |
| Datensatznummer |
250084994
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| Publikation (Nr.) |
 copernicus.org/gmd-6-1591-2013.pdf |
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| Zusammenfassung |
| Direction relations between object groups play an important
role in qualitative spatial reasoning, spatial computation and spatial
recognition. However, none of existing models can be used to compute
direction relations between object groups. To fill this gap, an approach to
computing direction relations between separated object groups is proposed in
this paper, which is theoretically based on gestalt principles and the idea
of multi-directions. The approach firstly triangulates the two object
groups, and then it constructs the Voronoi diagram between the two groups
using the triangular network. After this, the normal of each Voronoi edge is
calculated, and the quantitative expression of the direction relations is
constructed. Finally, the quantitative direction relations are transformed
into qualitative ones. The psychological experiments show that the proposed
approach can obtain direction relations both between two single objects and
between two object groups, and the results are correct from the point of
view of spatial cognition. |
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