Exact L∞ nearest neighbor search in high dimensions

  • Authors:
  • Helmut Alt;Laura Heinrich-Litan

  • Affiliations:
  • Institut für Informatik, Freie Universität Berlin, D-14195 Berlin, Germany;Institut für Informatik, Freie Universität Berlin, D-14195 Berlin, Germany

  • Venue:
  • SCG '01 Proceedings of the seventeenth annual symposium on Computational geometry
  • Year:
  • 2001

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Abstract

We present an algorithm for solving the nearest neighbor problem with respect to $L_{\infty}$-distance. It requires no preprocessing and storage only for the point set $P$. Its average runtime assuming that the set $P$ of $n$ points is drawn randomly from the unit cube $[0,1]^{d}$ under uniform distribution is essentially $\Theta (nd/ln\; n)$ thereby improving the brute-force method by a factor of $\Theta (1/ln\; n)$. Several generalizations of the method are also presented, in particular to other “well-behaved” probability distributions and to the important problem of finding the $k$ nearest neighbors to a query point.