Teager-Kaiser Energy and Higher-Order Operators in White-Light Interference Microscopy for Surface Shape Measurement
Boudraa, Abdel-Ouahab ;Montaner, Denis ;Montgomery, Paul C.;Salzenstein, Fabien ;
eurasip journal on advances in signal processing2005Vol. 2005pp. 2804-2815
203
boudraa2005teagerkaisereurasip
Abstract
In white-light interference microscopy, measurement of surface shape generally requires peak extraction of the fringe function envelope. In this paper the Teager-Kaiser energy and higher-order energy operators are proposed for efficient extraction of the fringe envelope. These energy operators are compared in terms of precision, robustness to noise, and subsampling. Flexible energy operators, depending on order and lag parameters, can be obtained. Results show that smoothing and interpolation of envelope approximation using spline model performs better than Gaussian-based approach.