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Polygonal Curve Approximation Using Grid Points with Application to a Triangular Mesh Generation with Small Number of Different Edge Lengths

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Algorithmic Aspects in Information and Management (AAIM 2006)

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Abstract

For a given x-monotone polygonal curve each of whose edge lengths is between \(\underline{l}\) and \(2\underline{l}\), we consider the problem of approximating it by another x-monotone polygonal curve using points of a square grid so that there exists a small number of different edge lengths and every edge length is between \(\underline{l}\) and \(\beta \underline{l}\), where β is a given parameter satisfying 1≤β≤2. Our first algorithm computes an approximate polygonal curve using fixed square grid points in O((n/α 4)log(n/α)) time. Based on this, our second algorithm finds an approximate polygonal curve as well as an optimal grid placement simultaneously in O((n 3/α 12)log2(n/α)) time, where α is a parameter that controls the closeness of approximation. Based on the approximate polygonal curve, we shall give an algorithm for finding a uniform triangular mesh for an x-monotone polygon with a constant number of different edge lengths.

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Tanigawa, Si., Katoh, N. (2006). Polygonal Curve Approximation Using Grid Points with Application to a Triangular Mesh Generation with Small Number of Different Edge Lengths. In: Cheng, SW., Poon, C.K. (eds) Algorithmic Aspects in Information and Management. AAIM 2006. Lecture Notes in Computer Science, vol 4041. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11775096_16

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  • DOI: https://doi.org/10.1007/11775096_16

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-35157-3

  • Online ISBN: 978-3-540-35158-0

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