About the algebraic solutions of smallest enclosing cylinders problems

Original Paper

Abstract

Given n points in Euclidean space Ed, we propose an algebraic algorithm to compute the best fitting (d−1)-cylinder. This algorithm computes the unknown direction of the axis of the cylinder. The location of the axis and the radius of the cylinder are deduced analytically from this direction. Special attention is paid to the case d = 3 when n = 4 and n = 5. For the former, the minimal radius enclosing cylinder is computed algebrically from constrained minimization of a quartic form of the unknown direction of the axis. For the latter, an analytical condition of existence of the circumscribed cylinder is given, and the algorithm reduces to find the zeroes of an one unknown polynomial of degree at most 6. In both cases, the other parameters of the cylinder are deduced analytically. The minimal radius enclosing cylinder is computed analytically for the regular tetrahedron and for a trigonal bipyramids family with a symmetry axis of order 3.

Keywords

Best fitting cylinder Smallest enclosing cylinder Minimal cylinder Circumscribed cylinder through five points Numerical algorithm 

Mathematics Subject Classification (2010)

51M04 51N15 65D10 65K05 90C26 

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  1. 1.MTi, INSERM UMR-S 973, University Paris 7Paris Cedex 13France

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