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Proceedings Paper

Estimation of interferogram aberration coefficients using wavelet bases and Zernike polynomials
Author(s): Alfredo A. Elias-Juarez; Noe Razo-Razo; Miguel Torres-Cisneros
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Paper Abstract

This paper combines the use of wavelet decompositions and Zernike polynomial approximations to extract aberration coefficients associated to an interferogram. Zernike polynomials are well known to represent aberration components of a wave-front. Polynomial approximation properties on a discrete mesh after an orthogonalization process via Gram-Schmidt decompositions are very useful to straightforward estimate aberration coefficients. It is shown that decomposition of interferograms into wavelet domains can reduce the number of computations without a significant effect on the estimated aberration coefficients amplitudes if full size interferograms were considered. Haar wavelets because of their non-overlapping and time localization properties appear to be well suited for this application. Aberration coefficients can be computed from multi resolution decompositions schemes and 2-D Zernike polynomial approximations on coarser scales, providing the means to reduce computational complexity on such calculations.

Paper Details

Date Published: 5 December 2001
PDF: 10 pages
Proc. SPIE 4478, Wavelets: Applications in Signal and Image Processing IX, (5 December 2001); doi: 10.1117/12.449733
Show Author Affiliations
Alfredo A. Elias-Juarez, Ctr. Nacional de Metrologia (Mexico)
Noe Razo-Razo, Ctr. Nacional de Metrologia and Univ. de Guanajuato (Mexico)
Miguel Torres-Cisneros, Univ. de Guanajuato (Mexico)

Published in SPIE Proceedings Vol. 4478:
Wavelets: Applications in Signal and Image Processing IX
Andrew F. Laine; Michael A. Unser; Akram Aldroubi, Editor(s)

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