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Quiroga Mellado, Juan Antonio ; Villa Hernández, José de Jesús ; Rodríguez-Vera, Ramón ; Rosa Vargas, José Ismael de la ; González Ramírez, Efrén | Elsevier Sci. Ltd. | 2010-06In our recently reported work [1] (Villa et al., 2009) we derived a regularized quadratic-cost function, which includes fringe orientation information, for denosing fringe pattern images. In this work we adopt such idea for denoising wrapped pha[...]texto impreso
Quiroga Mellado, Juan Antonio ; Villa Hernández, José de Jesús ; Crespo Vázquez, Daniel | SPIE--The International Society for Optical Engineering | 1999In this work we present two methods for the analysis of moire deflectograms. The first method is a Fourier-transform technique. The second method uses a regularization based method. Both methods are applied to realistic deflectograms and their p[...]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
Quiroga Mellado, Juan Antonio ; Villa Hernández, José de Jesús ; Servín Guirado, Manuel ; Estrada, Julio César ; Rosa Vargas, José Ismael de la | The Optical Society Of America | 2010-08-02It has been demonstrated that the vectorial fringe-direction field is very important to demodulate fringe patterns without a dominant (or carrier) frequency. Unfortunately, the computation of this direction-filed is by far the most difficult tas[...]texto impreso
Quiroga Mellado, Juan Antonio ; Villa Hernández, José de Jesús ; Rosa Vargas, José Ismael de la | Alan E. Willner, University of Southern California | 2009-06-01We use the regularization theory in a Bayesian framework to derive a quadratic cost function for denoising fringe patterns. As prior constraints for the regularization problem, we propose a Markov random field model that includes information abo[...]texto impreso
Quiroga Mellado, Juan Antonio ; Pascual Ramírez, Sergio ; Villa Hernández, José de Jesús | SPIE--The International Society for Optical Engineering | 2008There are two main steps in the analysis of photoelastic fringe patterns: the isoclinics and isochromatics computation. For the isochromatic computation there exist several possibilities but one of the best, from the point of view of reliability[...]
