Spectral reconstruction of piecewise smooth functions from their discrete data

Anne Gelb; Eitan Tadmor

ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique (2002)

  • Volume: 36, Issue: 2, page 155-175
  • ISSN: 0764-583X

Abstract

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This paper addresses the recovery of piecewise smooth functions from their discrete data. Reconstruction methods using both pseudo-spectral coefficients and physical space interpolants have been discussed extensively in the literature, and it is clear that an a priori knowledge of the jump discontinuity location is essential for any reconstruction technique to yield spectrally accurate results with high resolution near the discontinuities. Hence detection of the jump discontinuities is critical for all methods. Here we formulate a new localized reconstruction method adapted from the method developed in Gottlieb and Tadmor (1985) and recently revisited in Tadmor and Tanner (in press). Our procedure incorporates the detection of edges into the reconstruction technique. The method is robust and highly accurate, yielding spectral accuracy up to a small neighborhood of the jump discontinuities. Results are shown in one and two dimensions.

How to cite

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Gelb, Anne, and Tadmor, Eitan. "Spectral reconstruction of piecewise smooth functions from their discrete data." ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique 36.2 (2002): 155-175. <http://eudml.org/doc/245919>.

@article{Gelb2002,
abstract = {This paper addresses the recovery of piecewise smooth functions from their discrete data. Reconstruction methods using both pseudo-spectral coefficients and physical space interpolants have been discussed extensively in the literature, and it is clear that an a priori knowledge of the jump discontinuity location is essential for any reconstruction technique to yield spectrally accurate results with high resolution near the discontinuities. Hence detection of the jump discontinuities is critical for all methods. Here we formulate a new localized reconstruction method adapted from the method developed in Gottlieb and Tadmor (1985) and recently revisited in Tadmor and Tanner (in press). Our procedure incorporates the detection of edges into the reconstruction technique. The method is robust and highly accurate, yielding spectral accuracy up to a small neighborhood of the jump discontinuities. Results are shown in one and two dimensions.},
author = {Gelb, Anne, Tadmor, Eitan},
journal = {ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique},
keywords = {edge detection; nonlinear enhancement; concentration method; piecewise smoothness; localized reconstruction; localized reconstruction.},
language = {eng},
number = {2},
pages = {155-175},
publisher = {EDP-Sciences},
title = {Spectral reconstruction of piecewise smooth functions from their discrete data},
url = {http://eudml.org/doc/245919},
volume = {36},
year = {2002},
}

TY - JOUR
AU - Gelb, Anne
AU - Tadmor, Eitan
TI - Spectral reconstruction of piecewise smooth functions from their discrete data
JO - ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique
PY - 2002
PB - EDP-Sciences
VL - 36
IS - 2
SP - 155
EP - 175
AB - This paper addresses the recovery of piecewise smooth functions from their discrete data. Reconstruction methods using both pseudo-spectral coefficients and physical space interpolants have been discussed extensively in the literature, and it is clear that an a priori knowledge of the jump discontinuity location is essential for any reconstruction technique to yield spectrally accurate results with high resolution near the discontinuities. Hence detection of the jump discontinuities is critical for all methods. Here we formulate a new localized reconstruction method adapted from the method developed in Gottlieb and Tadmor (1985) and recently revisited in Tadmor and Tanner (in press). Our procedure incorporates the detection of edges into the reconstruction technique. The method is robust and highly accurate, yielding spectral accuracy up to a small neighborhood of the jump discontinuities. Results are shown in one and two dimensions.
LA - eng
KW - edge detection; nonlinear enhancement; concentration method; piecewise smoothness; localized reconstruction; localized reconstruction.
UR - http://eudml.org/doc/245919
ER -

References

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  12. [0] E. Tadmor and J. Tanner, Adaptive mollifiers for high resolution recovery of piecewise smooth data from its spectral information, Foundations of Comput. Math. Online publication DOI: 10.1007/s002080010019 (2001), in press. Zbl1056.42002MR1894374
  13. [0] A. Zygmund, Trigonometric Series. Cambridge University Press (1959). Zbl0085.05601MR107776

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