title: Comparison of real-time phase-reconstruction methods in temporal speckle-pattern interferometry.
abstract: Three real-time methods for object-phase recovery are implemented and compared in temporal speckle-pattern interferometry. Empirical mode and intrinsic time-scale decompositions are used and compared as real-time nonstationary and nonlinear filtering techniques for the extraction of the spatio-temporal evolution of the object phase. The proposed real-time methods avoid the application of the Hilbert transform and improve the accuracy of the measurement by filtering under-modulated pixels using Delaunay triangulation. The performance of the proposed methods is evaluated by comparing phase-recovery accuracy and computation time by means of numerical simulations and experimental data obtained from common and simultaneous π/2 phase-shifting heterodyne interferometry.
authors.forename: Pablo
authors.initials: P
authors.lastname: Etchepareborda
authors.forename: Arturo
authors.initials: A
authors.lastname: Bianchetti
authors.forename: Francisco E
authors.initials: FE
authors.lastname: Veiras
authors.forename: Ana Laura
authors.initials: AL
authors.lastname: Vadnjal
authors.forename: Alejandro
authors.initials: A
authors.lastname: Federico
authors.forename: Guillermo H
authors.initials: GH
authors.lastname: Kaufmann