Dimension detection via slivers

  • Authors:
  • Siu-Wing Cheng;Man-Kwun Chiu

  • Affiliations:
  • HKUST, Clear Water Bay, Hong Kong;HKUST, Clear Water Bay, Hong Kong

  • Venue:
  • SODA '09 Proceedings of the twentieth Annual ACM-SIAM Symposium on Discrete Algorithms
  • Year:
  • 2009

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Abstract

We present a novel approach to estimate the dimension m of an unknown manifold M ⊂ Rd with positive reach from a set of point samples P ⊂ M. It works by analyzing the shape of simplices formed by point samples. Suppose that P is drawn from M according to a Poisson process with an unknown parameter λ. Let k be some fixed positive integer. When λ is large enough, we prove that the dimension can be correctly output in O(kd|P|1+1/k) time with probability greater than 1-2-k. We experimented with a practical variant and showed that its performance is competitive with several previous methods.