Recent Submissions

• Skin color correction via convolutional neural networks in 3D fringe projection profilometry 

  Barrios Montes, Erik Miguel; Pineda, Jesús; Romero Pérez, Lenny Alexandra; Millán Garcia-Varela, M. Sagrario; Marrugo Hernandez, Andrés Guillermo (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2021)
  Conference lecture
  Restricted access - publisher's policy

  Fringe Projection Profilometry (FPP) with Digital Light Projector technology is one of the most reliable 3D sensing techniques for biomedical applications. However, besides the fringe pattern images,often a color texture ...
• Automated corneal endothelium image segmentation in the presence of cornea guttata via convolutional neural networks - 115110H 

  Sierra Bravo, Juan Sebastián; Pineda, Jesús; Viteri Coronel, Eduardo; Rueda Latorre, Daniela; Tibaduiza Vargas, Beatriz Eugenia; Berrospi, Rubén; Tello, Alejandro; Galvis Ramírez, Virgilio; Volpe, Giovanni; Millán Garcia-Varela, M. Sagrario; Romero Pérez, Lenny Alexandra; Marrugo Hernandez, Andrés Guillermo (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2020)
  Conference report
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  Automated cell counting in in-vivo specular microscopy images is challenging, especially in situations where single-cell segmentation methods fail due to pathological conditions. This work aims to obtain reliable cell ...
• 20/21 Central Event in Spain of the International Day of Light: outreach and citizen engagement in time of pandemic 

  Pérez Cabré, Elisabet; Millán Garcia-Varela, M. Sagrario; Armengol Cebrian, Jesús (Optica Publishing Group, 2021)
  Conference report
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  The 3rd central IDL Event in Spain probably gathered the largest number of activities for the 16th May commemoration in 2021. Conferences, debates, workshops, exhibitions, light shows, and photo contests, adapted to severe ...
• Diseño y caracterización de un dispositivo óptico para la evaluación de lentes intraoculares in vitro 

  Azor Morón, Juan Antonio; Mendoza Parraga, Alison; Vega Lerín, Fidel; Millán Garcia-Varela, M. Sagrario (Comité de Optoelectrónica, 2021)
  Conference lecture
  Restricted access - publisher's policy

  Se ha realizado el diseño y la caracterización de un dispositivo en banco óptico, que incorpora un nuevo modelo de ojo fisiológico y un sistema de óptica adaptativa controlado por ordenador, para la evaluación in vitro de ...
• Frecuencia de parpadeo y parpadeos incompletos en seis condiciones controladas de lectura en formato electrónico y en papel 

  Argilés Sans, Marc; Cardona Torradeflot, Genís; Pérez Cabré, Elisabet; Rodríguez Montiel, Margarita (2016)
  Conference lecture
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• Graphical ray tracing through imaging optical systems for optometrists 

  Millán Garcia-Varela, M. Sagrario; Escofet Soteras, Jaume; Pérez Cabré, Elisabet; Cobo Ruiz, Fernando (ITMO University (University of Information Technologies, Mechanics and Optics), 2008)
  Conference lecture
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  In the approach of geometrical optics, ray tracing is an illustrative tool to determine the light path through an optical system. We show different educational resources used to help students to develop their skills ...
• Photon-counting imaging based double-random-phase encryption for information security and verification 

  Pérez Cabré, Elisabet; Abril, Héctor C; Millán Garcia-Varela, M. Sagrario; Javidi, Bahram (Institute of Electrical and Electronics Engineers (IEEE), 2011)
  Conference report
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  The integration of photon-counting imaging techniques to optical encryption systems permits to increase information authentication robustness against intruder attacks. Photon-counting imaging generates distributions with ...
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  Optical implementation of multifocal programmable lens with single and multiple axes 

  Romero Pérez, Lenny Alexandra; Millán Garcia-Varela, M. Sagrario; Pérez Cabré, Elisabet (Institute of Physics (IOP), 2010)
  Conference lecture
  Open Access

  In this work we analyse the generation of a diffractive optical element (DOE) consisting of a multifocal Fresnel lens by means of an LCoS (liquid cristal on silicon) spatial light modulator (SLM). The multifocal lens is ...
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  Experimental color encryption in a joint transform correlator architecture 

  Tebaldi, Myriam; Horrillo, Sergio; Pérez Cabré, Elisabet; Millán Garcia-Varela, M. Sagrario; Amaya, Dafne; Torroba, Roberto; Bolognini, Néstor (Institute of Physics (IOP), 2010)
  Conference lecture
  Open Access

  We present an experimental color image encryption by using a photorefractive crystal and a joint transform correlator (JTC) architecture. We achieve the color storing by changing the illumination wavelength. One JTC aperture ...
• Spatial and speed characterization of a phase-only LCoS spatial light modulator for an improved performance in optical information processing 

  Otón, Joaquín; Millán Garcia-Varela, M. Sagrario; Ambs, Pierre; Pérez Cabré, Elisabet (ITMO University (University of Information Technologies, Mechanics and Optics), 2008)
  Conference lecture
  Restricted access - publisher's policy
• Codificación de la función de fase de una lente compuesta multifocal presentada por un modulador LCoS 

  Romero Pérez, Lenny Alexandra; Millán Garcia-Varela, M. Sagrario; Pérez Cabré, Elisabet (2009)
  Conference lecture
  Restricted access - publisher's policy
• Optical validation of combined images for high-secure identification. ID tags and processors 

  Millán Garcia-Varela, M. Sagrario; Pérez Cabré, Elisabet; Bahram, Javidi (2007)
  Conference report
  Restricted access - publisher's policy

  In this work, we use a novel multifactor encryption-authentication technique that reinforces optical security by allowing the simultaneous AND-verification of more than one primary image. This optical technique is attractive ...

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