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Refinable Bivariate Quartic $C^2$-splines for Multi-level Data Representation and Surface Display
Mathematics of Computation (2004)
  • Charles K. Chui, University of Missouri–St. Louis
  • Qingtang Jiang, University of Missouri–St. Louis
Abstract
In this paper, a second-order Hermite basis of the space of C2- quartic splines on the six-directional mesh is constructed and the refinable mask of the basis functions is derived. In addition, the extra parameters of this basis are modified to extend the Hermite interpolating property at the integer lattices by including Lagrange interpolation at the half integers as well. We also formulate a compactly supported super function in terms of the basis functions to facilitate the construction of quasi-interpolants to achieve the highest (i.e., fifth) order of approximation in an efficient way. Due to the small (minimum) support of the basis functions, the refinable mask immediately yields (up to) four-point matrix-valued coefficient stencils of a vector subdivision scheme for efficient display of C2-quartic spline surfaces. Finally, this vector subdivision approach is further modified to reduce the size of the coefficient stencils to two-point templates while maintaining the second-order Hermite interpolating property
Publication Date
July 28, 2004
DOI
10.1090/S0025-5718-04-01702-8
Citation Information
Charles K. Chui and Qingtang Jiang. "Refinable Bivariate Quartic $C^2$-splines for Multi-level Data Representation and Surface Display" Mathematics of Computation Vol. 74 Iss. 251 (2004) p. 1369 - 1390
Available at: http://works.bepress.com/qingtang-jiang/28/