Published: Jun 1, 2008 Author(s): Egenhofer, Max J., Wuersch, Markus Abstract: An automated extraction of regions from sketches can be of great value for multi-modal user interfaces and for interpreting spatial data. This paper develops the Perceptual Sketch Interpretationalgorithm, which employs the theory of topological relations from spatial reasoning as well as continuity and good gestalt from gestalt theory
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