Artificial Intelligence
IJCAI '99 Proceedings of the Sixteenth International Joint Conference on Artificial Intelligence
Metric details of topological line-line relations
International Journal of Geographical Information Science
Leaf classification using navigation-based skeletons
Proceedings of the 2006 conference on ECAI 2006: 17th European Conference on Artificial Intelligence August 29 -- September 1, 2006, Riva del Garda, Italy
Comparison of detailed descriptors for noisy silhouettes
Machine Graphics & Vision International Journal
LWDOS: language for writing descriptors of outline shapes
SCIA'03 Proceedings of the 13th Scandinavian conference on Image analysis
Strings and holes: an exercise on spatial reasoning
IBERAMIA-SBIA'06 Proceedings of the 2nd international joint conference, and Proceedings of the 10th Ibero-American Conference on AI 18th Brazilian conference on Advances in Artificial Intelligence
Characterising meanders qualitatively
GIScience'06 Proceedings of the 4th international conference on Geographic Information Science
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In this paper we extend previous work on the boundary-based approach to describing shape, by deriving an unbounded hierarchy of "atomic" shape descriptors (called tokens) based on tangent bearing and its successive derivatives, and incorporating angle and cusp curve features. Both open and closed curves have token-string descriptions at all levels in the hierarchy. We provide a pair of compatibility matrices for generating transition tables for any level, from which level-specific token ordering graphs that encode basic string syntax can be systematically constructed.