Dr. Ricardo Legarda Sáenz

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Education and Awards

•  Doctoral degree in Sciences (Optics), Centro de Investigaciones en Óptica. A. C. (Mexico), 2000.
• Distinction for academic performance. Thesis work related with computational techniques for the moiré deflectometry technique:

1. 1. Simulation of geometrical propagation of light through an inhomogeneous medium using ray-tracing techniques.
   2. Processing the experimental data generated by the technique.

• Master degree in Electronic Engineering (Computation), Instituto Tecnológico de Chihuahua (Mexico), 1997. Special recognition for degree examination.

Thesis work related with character recognition using invariant moments as descriptors and neural networks as classifier.

• Bachelor degree in Industrial Engineering (Electronic), Instituto Tecnológico de Chihuahua (Mexico), 1991.

Research interests and projects

My principal interest is the applications of optical shape measurement for the evaluation of complex objects. At present, I am working in the calibration and measurement of a fringe projection system, and the measured data matching from different views and/or different devices. A second interest is the processing of fringe patterns using inverse-problems approach.

Publications

1. Carlos Brito-Loeza, Ricardo Legarda-Sáenz, Anabel Martin-Gonzalez, "A fast algorithm for a total variation based phase demodulation model" (ISSN: 1098-2426), Numerical Methods for Partial Differential Equations, 36 (3), Pag. 617-636, 2019.
2. Carlos Brito-Loeza, Ricardo Legarda-Sáenz, Arturo Espinosa-Romero, Anabel Martin-Gonzalez, "A Mean Curvature Regularized Based Model for Demodulating Phase Maps from Fringe Patterns" (ISSN: 1815-2406), Communications in Computational Physics, Vol. 24, No. 1, Pag. 27-43, 2018.
3. Jorge L. Flores, José A. Ferrari, G. GarcíaTorales, Ricardo Legarda-Saenz, Adriana Silva, "Color-fringe pattern profilometry using a generalized phase-shifting algorithm", Appl. Opt. 54, 8827-8834 (2015).
4. Adonai Gonzalez, Mariano Rivera, Manuel Servin, Ricardo Legarda-Saenz, Oscar Dalmau, and Amalia Martinez, "Synchronous phase demodulation algorithm for conic carrier Hartmann topographer", Opt. Lasers Eng. 67, 157–162 (2015).
5. J. L. Flores, R. Legarda-Saenz, and G. Garcia-Torales, "Color deflectometry for phase retrieval using phase-shifting methods", Opt. Commun. 334, 298–302 (2015).
6. R. Legarda-Saenz, C. Brito-Loeza, and A. Espinosa-Romero, "Total variation regularization cost function for demodulating phase discontinuities", Appl. Opt. 53, 2297–2301 (2014).
7. R. Legarda-Saenz, C. Brito-Loeza, M. Rivera, and A. Espinosa-Romero, "Variational method for integrating radial gradient field", Opt. Lasers Eng. 63, 53–57 (2014).
8. A. Espinosa-Romero and R. Legarda-Saenz, "GPU based real-time quadrature transform method for 3-D surface measurement and visualization", Opt. Express 19, 12125–12130 (2011).
9. R. Legarda-Saenz and A. Espinosa-Romero, "Wavefront reconstruction using multiple directional derivatives and Fourier transform", Opt. Eng. 50, 040501 (2011).
10. R. Legarda-Saenz, R. Rodriguez-Vera, and A. Espinosa-Romero, "Dynamic 3-D shape measurement method based on quadrature transform", Opt. Express 18, 2639–2645 (2010).
11. O. S. Dalmau-Cedeno, M. Rivera, and R. Legarda-Saenz, "Fast phase recovery from a single closed-fringe pattern", J. Opt. Soc. Am. A 25, 1361–1370 (2008).
12. R. Legarda-Saenz, "Robust wavefront estimation using multiple directional derivatives in moiré deflectometry", Opt. Lasers Eng. 45, 915–921 (2007).
13. R. Legarda-Saenz and M. Rivera, "Fast half-quadratic regularized phase tracking for nonnormalized fringe patterns", J. Opt. Soc. Am. A 23, 2724–2731 (2006).
14. R. Legarda-Saenz, T. Bothe, and W. P. Juptner, "Accurate procedure for the calibration of a structured light system", Opt. Eng. 43, 464–471 (2004).
15. R. Legarda-Saenz, W. Osten, and W. P. Juptner, "Improvement of the regularized phase tracking technique for the processing of nonnormalized fringe patterns", Appl. Opt. 41, 5519–5526 (2002).
16. R. Legarda-Saenz, M. Rivera, and R. Rodriguez-Vera, "Quadratic cost functional for wave-frontreconstruction", Appl. Opt. 41, 1515–1521 (2002).
17. R. Legarda-Saenz, M. Rivera, R. Rodriguez-Vera, and G. Trujillo-Schiaffino, "Robust wave-front estimation from multiple directional derivatives", Opt. Lett. 25, 1089–1091 (2000).
18. R. Legarda-Saenz, R. Rodriguez-Vera, and M. Rivera, "Nonparaxial method for computing the gradient field of a wavefront using moiré deflectometry", Opt. Commun. 160, 214–218 (1999).

Completed Theses

• Estimación de pose para un VANT por medio de sensores inerciales y navegación satelital, [Pose estimation for VANT through inertial snesors and satellite navigation] (en colaboración con el Dr. Arturo Espinosa Romero, UADY), UADY, Alex Turriza Suárez, 2019.
• Detección del árbol de Dzidzilché usando imágenes aéreas multiespectrales y redes neuronales convolucionales [Dzildzilché tree detection using multispectral aerial images and convolutional neural networks], UADY, Juan José Negrón Granados, 2019.
• Reconstrucción tridimensional de objetos estáticos basado en un sistema de proyección de patrones, [Three-dimensional reconstruction of static object based on a pattern projection system], UADY, José Francisco Quintal Vázquez, 2016.
• Reconstrucción 3D de objetos, utilizando algoritmos de proyección de patrones binarios y cambio de fase, [3D reconstruction of objects, using binary pattern projection and phase shift algorithms], CUCEI, Universidad de Guadalajara, Adriana Silva Mejía, 2015.
• Visualización de objetos de fase dinámica usando computación paralela, [Dynamic phase object visualization using parallel computing], CUCEI, Universidad de Guadalajara, Oscar E. Castillo Serrano, 2014.
• Automatización de un sistema de captura de fotografía aérea oara la generación de mosaicos de imágenes, [Automatization of aerial capture system for mosaicing construction] UADY, Irving D. Sánchez Machay, 2014.
• Estimación homográfica en imágenes aéreas georreferenciadas para la construcción de mosaicos, [Homography estimation in aerial georeferenced images for mosaicing construction.], UADY, March Xavier Sierra Canto, 2012.
• Generación de mosaicos de imágenes aéreas [Mosaic generation of aerial images](en colaboración con el Dr. Arturo Espinosa Romero, UADY), UADY, Maestría, Xavier Sierra Canto, 2011.
• Integración de derivadas direccionales en el módulo 2, [Integration of directional derivatives in module 2], UADY, Iván May Cen, 2009.
• Parámetros estimados de las superficies de una lente oftálmica progresiva mediante trazado de rayos, [Estimated parameters of the surfaces of a progressive ophthalmic lens using ray tracing], UADY, Alejandro Tellez Quiñones, 2008.
• Análisis de sensibilidad de patrones de franjas radiales para obtener un frente de onda usando una sola imagen, [Sensitivity analysis of radial fringe patterns to obtain a wavefront using a single image], UADY, Heidy Cecilia Escamilla Puc, 2008.
• Recuperación de la topografía de la piel humana in-vivo mediante proyección de franjas. Facultad de Ingeniería, [Recovery of the topography of human skin in-vivo using fringe projection. Faculty of Engineering], UADY, Karla Denaly Palma Alejandro,
• Estudio comparativo de técnicas de segmentación aplicadas a imágenes del litoral de Yucatán, [Comparative study of segmentation techniques applied to images of the coastline of Yucatan], UADY, Emmanuel A. Castillo Solis, 2006.