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Gaussian Bayesian networks are graphical models that represent the dependence structure of a multivariate normal random variable with a directed acyclic graph (DAG). In Gaussian Bayesian networks the output is usually the conditional distributio[...]texto impreso
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 ; Vargas, Javier ; Estrada, Julio César ; Carazo García, José María ; Sánchez Sorzano, Carlos Óscar | Elsevier Sci. Ltd. | 2013-07Noise is a key problem in fringe pattern processing, especially in single frame demodulation of interferograms. In this work, we propose to filter the pattern noise using a straightforward, fast and easy to implement denoising method, which is b[...]texto impreso
Díaz Herrera, Natalia ; Esteban Martínez, Óscar ; Navarrete Fernández, María Cruz ; González Cano, Agustín ; Benito Peña, María Elena ; Orellana Moraleda, Guillermo | Elsevier Sci. Ltd. | 2011-08We present the results of a chemical attack on the optical fiber surface previous to the deposition of the double layer (metal plus dielectric) in Double-layer uniform-waist tapered fibers (DLUWTs) used for the development of SPR sensors. It is [...]texto impreso
Quiroga Mellado, Juan Antonio ; Villa, J. ; Gómez Pedrero, José Antonio | Elsevier Sci. Ltd. | 2004-01The use of digital photoelasticity permits us to determine the distribution of principal stress difference by means of the analysis of a photoelastic fringe pattern using a phase measurement method. However, conventional phase measurement method[...]texto impreso
Quiroga Mellado, Juan Antonio ; Gómez Pedrero, José Antonio ; Terrón López, M. José ; Crespo Vázquez, Daniel | Elsevier Sci. Ltd. | 2006-12In this paper we present the application of a direct demodulation method for the measurement of surface topography by means of Shadow-Moiré. In our set-up, we use three LEDs (with green, red and blue peak wavelengths) to illuminate the grating. [...]texto impreso
Bernabeu Martínez, Eusebio ; Salgado Remacha, Francisco Javier ; Sánchez Martín, José Antonio | Elsevier Sci. Ltd. | 2014-04We present in this work a study of the diffraction of a focused Gaussian beam by a microrefractive cylinder, and the dependence of the far field diffracted pattern with the location of the beam focal plane, relative to the center of the cylinder[...]texto impreso
Díaz Herrera, Natalia ; González Cano, Agustín ; Viegas, Diana Catarino das Neves ; Santos, Jose Luis ; Navarrete Fernández, María Cruz | Elsevier Sci. Ltd. | 2010-04-08Experimental results are shown demonstrating that multiple surface plasma waves can be excited in optical fibres at the 1.5 ?m optical communications region for the range of refractive indices of aqueous media using doubly deposited tapered fibr[...]texto impreso
Esteban Martínez, Óscar ; Navarrete Fernández, María Cruz ; González Cano, Agustín ; Bernabeu Martínez, Eusebio | Elsevier Sci. Ltd. | 2000-03In this work we present an application of a simple quasi-geometrical model to analyze the behavior of compound waveguide structures used as fiber-optic sensors. This theoretical model is based on the adjustment of the parameters of the structure[...]texto impreso
Siegmann, Philip ; Martínez Antón, Juan Carlos ; Bernabeu Martínez, Eusebio | Elsevier Sci. Ltd. | 2004-08The quality of the surface of metallic wires is relevant for different applications. The reflection of a laser beam on the surface of a metallic cylindrical wire provides an efficient way to inspect the quality of its surface. Our interest is fo[...]texto impreso
Salgado Remacha, Francisco Javier ; Torcal Milla, Francisco José ; Sánchez Brea, Luis Miguel ; Bernabeu Martínez, Eusebio | Elsevier Sci. Ltd. | 2011-03Steel tape is used in optical applications due to its mechanical properties. However, roughness of steel surfaces affects to wave propagation. The effect can be observed using diffraction gratings with low periods. In such a case, self-images of[...]
