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Quiroga Mellado, Juan Antonio ; Gómez Pedrero, José Antonio ; Servín Guirado, Manuel | The Optical Society Of America | 2008-07-20We present a spatial adaptive asynchronous algorithm for fringe pattern demodulation. The proposed algorithm is based on the standard five-step asynchronous method with the one modification that we select the best sample spacing for each point o[...]texto impreso
Quiroga Mellado, Juan Antonio ; Servín Guirado, Manuel ; Cuevas de la Rosa, Francisco Javier | Elsevier Science BV | 2001-12-15First- and second-order recursive Digital Phase Locked Loops (DPLLs) have been used recently in fringe data processing because it is the fastest way to obtain the unwrapped phase of a carrier frequency fringe pattern due to its minimal computati[...]texto impreso
Quiroga Mellado, Juan Antonio ; Servín Guirado, Manuel ; Estrada, Julio César ; González, Christhian Adonai | The Optical Society Of America | 2011-05-23To estimate the modulating wavefront of an interferogram in Phase Shifting Interferometry (PSI) one frequently uses a Phase Shifting Algorithm (PSA). All PSAs take as input N phase-shifted interferometric measures, and give an estimation of thei[...]texto impreso
Quiroga Mellado, Juan Antonio ; Servín Guirado, Manuel ; Estrada, Julio César | The Optical Society Of America | 2009-02-15We show a practical way for building wideband phase-shifting algorithms for interferometry. The idea presented combines first- and second-order quadrature filters to obtain wideband phase-shifting algorithms. These first- and second-order quadra[...]texto impreso
Quiroga Mellado, Juan Antonio ; Servín Guirado, Manuel ; Marroquín Zaleta, José Luis ; Crespo Vázquez, Daniel | Optical Society of America | 2005-03The spatial orientation of the fringe has been demonstrated to be a key point in the reliable phase demodulation from a single n-dimensional fringe pattern regardless of the frequency spectrum of the signal. The recently introduced general n-dim[...]texto impreso
Quiroga Mellado, Juan Antonio ; Servín Guirado, Manuel ; Dávila Álvarez, Abundio | The Optical Society Of America | 2002-08-01In recent years the availability of high-speed digital video cameras has motivated the study of electronic speckle pattern interferometry (ESPI) in the time domain. To this end a properly sampled temporal sequence off-fringe patterns is used to [...]texto impreso
Quiroga Mellado, Juan Antonio ; Estrada, Julio C. ; Servín Guirado, Manuel ; Navarro, Miguel A. | The Optical Society Of America | 2012-01-30Here, we present a fast algorithm for two-dimensional (2D) phase unwrapping which behaves as a recursive linear filter. This linear behavior allows us to easily find its frequency response and stability conditions. Previously, we published a rob[...]texto impreso
Quiroga Mellado, Juan Antonio ; Servín Guirado, Manuel ; Marroquín Zaleta, José Luis | Optical Society of America | 2003-05Quadrature operators are useful for obtaining the modulating phase 0 in, interferometry and temporal signals in electrical communications. In carrier-frequency interferometry and electrical communications, one uses the Hilbert transform to obtai[...]texto impreso
Quiroga Mellado, Juan Antonio ; Villa Hernández, José de Jesús ; Servín Guirado, Manuel | The Optical Society Of America | 2000-02-01We propose a robust procedure based on the regularized phase-tracking (RPT) technique to demodulate squared-grating deflectograms. The use of squared gratings, already reported, lets us multiplex the information of the deflections in two orthogo[...]texto impreso
In this work we propose a robust fringe demodulation technique applied to the analysis of a single isochromatics fringe pattern produced in photoelasticity. The method used is a regularized phase tracking algorithm with a new sequential scanning[...]texto impreso
Fringe pattern normalization consists in the background suppression and modulation normalization of a given fringe pattern, this process gives as a result a pure sinusoidal phase modulated signal. Normalization is an important operation in the d[...]texto impreso
Quiroga Mellado, Juan Antonio ; Servín Guirado, Manuel ; Marroquín Zaleta, José Luis ; Gómez Pedrero, José Antonio | SPIE--The International Society for Optical Engineering | 2003In fringe pattern processing, quadrature operators are useful to obtain the corresponding modulating phase. In the case that a carrier exists (spatial or temporal), there are good methods for phase demodulation as Fourier analysis and asynchrono[...]texto impreso
Quiroga Mellado, Juan Antonio ; Estrada, Julio César ; Servín Guirado, Manuel | SPIE--The International Society for Optical Engineering | 2010Phase-shifting algorithms are methods used for recovering the modulating phase of an interferogram sequence obtained by Phase Stepping Interferometry (PSI) techniques. Typically, the number of interferograms in a PSI sequence is from 3 to around[...]texto impreso
Quiroga Mellado, Juan Antonio ; Servín Guirado, Manuel ; Cuevas de la Rosa, Francisco Javier | Optical Society of America | 2002-08The fringe orientation angle provides useful information for many fringe-pattern-processing techniques. From a single normalized fringe pattern (background suppressed and modulation normalized), the fringe orientation angle can be obtained by co[...]texto impreso
Quiroga Mellado, Juan Antonio ; Vargas, Javier ; Estrada, Julio C. ; Sánchez Sorzano, Carlos Óscar ; Servín Guirado, Manuel | The Optical Society Of America | 2012-08-20Fringe patterns with a multiplicative phase shift among them appear in experimental techniques as photoelasticity and RGB shadow moiré, among others. These patterns cannot be processed using standard phase-shifting demodulation techniques. In th[...]
