One approach to studying the Fréchet distance is to consider curves that satisfy realistic assumptions. By now, the most popular realistic assumption for curves is c-packedness. Existing algorithms for computing the Fréchet distance between c-packed curves require both curves to be c-packed. In this paper, we only require one of the two curves to be c-packed. Our result is a nearly-linear time algorithm that (1+ε)-approximates the Fréchet distance between a c-packed curve and a general curve in ℝ^d, for constant values of ε, d and c.
@InProceedings{gudmundsson_et_al:LIPIcs.ISAAC.2024.37, author = {Gudmundsson, Joachim and Mai, Tiancheng and Wong, Sampson}, title = {{Approximating the Fr\'{e}chet Distance When Only One Curve Is c-Packed}}, booktitle = {35th International Symposium on Algorithms and Computation (ISAAC 2024)}, pages = {37:1--37:14}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-354-6}, ISSN = {1868-8969}, year = {2024}, volume = {322}, editor = {Mestre, Juli\'{a}n and Wirth, Anthony}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ISAAC.2024.37}, URN = {urn:nbn:de:0030-drops-221649}, doi = {10.4230/LIPIcs.ISAAC.2024.37}, annote = {Keywords: Fr\'{e}chet distance, c-packed curve, approximation algorithm} }
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