Abstract
We present a qualitative shape description which has previously been proven to be useful for object categorisation. The description is based on a set of shape primitives which we will restrict to a new subset of relations representing stylised curvature information. In contrast to other qualitative shape theories, this description enables us to distinguish different convex shapes. This is especially interesting from a cognitive point of view since these shapes show salient visual differences. It turns out that the distinction between two sides of a line together with the distinction between acute and obtuse angles make up a powerful concept of orientation information for shapes in two dimensions.
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Gottfried, B. (2003). Tripartite Line Tracks Qualitative Curvature Information. In: Kuhn, W., Worboys, M.F., Timpf, S. (eds) Spatial Information Theory. Foundations of Geographic Information Science. COSIT 2003. Lecture Notes in Computer Science, vol 2825. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-39923-0_8
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DOI: https://doi.org/10.1007/978-3-540-39923-0_8
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