Abstract
We prove that any subset of ℝ2 parametrized by a C 1 periodic function and its derivative is the Euclidean invariant signature of a closed planar curve. This solves a problem posed by Calabi et al. (Int. J. Comput. Vis. 26:107–135, 1998). Based on the proof of this result, we then develop some cautionary examples concerning the application of signature curves for object recognition and symmetry detection as proposed by Calabi et al.
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In memory of Professor Aristide Sanini.
Authors partially supported by MIUR projects: Metriche riemanniane e varietà differenziabili (E.M.); Proprietà geometriche delle varietà reali e complesse (L.N.); and by the GNSAGA of INDAM.
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Musso, E., Nicolodi, L. Invariant Signatures of Closed Planar Curves. J Math Imaging Vis 35, 68–85 (2009). https://doi.org/10.1007/s10851-009-0155-0
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DOI: https://doi.org/10.1007/s10851-009-0155-0