Now showing items 1-20 of 20

    • A full Stokes imaging polarimeter based on a consumer CMOS camera 

      Peña Gutiérrez, Sara; Ballesta Garcia, Maria; Royo Royo, Santiago (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2019)
      Conference lecture
      Restricted access - publisher's policy
      Nowadays, taking advantage of polarization allows enhancing the contrast of a detected object and extending the information of the scene compared to conventional intensity imagery, as the information added by polarimetric ...
    • A LiDAR imaging system using temporal and polarization discrimination for turbid media 

      Ballesta Garcia, Maria; Peña Gutiérrez, Sara; Rodríguez Aramendía, Ana; García Gómez, Pablo; Rodrigo Arcay, Noel; Royo Royo, Santiago (2023)
      Conference report
      Restricted access - publisher's policy
      In recent times, there has been a surge of interest in LiDAR imaging systems, particularly in outdoor terrestrial applications associated with computer vision. However, a significant hurdle preventing their widespread ...
    • Activities in imaging through fog at CD6: polarimetric imaging 

      Peña Gutiérrez, Sara; Ballesta Garcia, Maria; Royo Royo, Santiago (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Conference report
      Restricted access - publisher's policy
      The CD6 has recently developed a powerful line of research on polarimetric imaging. This field covers several applications in which the addition of polarization properties enables to enhance the contrast in detection. ...
    • Activities in imaging through fog at CD6: polarized light propagation modelling 

      Ballesta Garcia, Maria; Peña Gutiérrez, Sara; Royo Royo, Santiago (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Conference report
      Restricted access - publisher's policy
      Currently, in CD6, a new line of research devoted to polarimetric imaging is being developed. The use of polarization adds new information that is not reachable using other conventional imaging modes. In addition, recent ...
    • Analysis of the performance of a polarized LiDAR imager in fog 

      Ballesta Garcia, Maria; Peña Gutiérrez, Sara; Rodríguez Aramendía, Ana; García Gómez, Pablo; Rodrigo Arcay, Noel; Bobi Olmo, Aleix Ramón; Royo Royo, Santiago (2022-11-07)
      Article
      Open Access
      This paper focuses on exploring ways to improve the performance of LiDAR imagers through fog. One of the known weaknesses of LiDAR technology is the lack of tolerance to adverse environmental conditions, such as the presence ...
    • Design and construction of a snapshot full-Stokes polarimetric camera : seeing through fog 

      Peña Gutiérrez, Sara (Universitat Politècnica de Catalunya, 2023-02-24)
      Doctoral thesis
      Open Access
      (English) Polarization is one of the properties of light and it is often put aside. Human beings receive light beams and process only the intensity and wavelength information. Our optical system lacks the capability of ...
    • Detección de luz en medios turbios: simulaciones de Monte-Carlo para imagen activa usando luz polarizada o detección resuelta en el tiempo 

      Ballesta Garcia, Maria; Peña Gutiérrez, Sara; Royo Royo, Santiago (Universidad de Zaragoza (UZA), 2019)
      Conference lecture
      Restricted access - publisher's policy
      La obtención de imágenes en condiciones climatológicas adversas (como niebla, lluvia y neblina), es uno de los problemas que afecta actualmente la investigación en el campo de la navegación, como resultado del creciente ...
    • Evaluación de modos de imagen polarimétrica en una cámara de niebla mediante el uso del contraste de imagen 

      Ballesta Garcia, Maria; Peña Gutiérrez, Sara; Val Martí, Aina; Royo Royo, Santiago (Comité de Optoelectrónica, 2021)
      Conference lecture
      Restricted access - publisher's policy
      Mediante el uso de una cámara polarimétrica y una fuente de luz linealmente polarizada, se ha realizado una comparativa entre distintos modos de imagen polarimétrica e imagen de intensidad en un entorno de niebla controlado. ...
    • Experimental characterization of polarized light backscattering in fog environments 

      Ballesta Garcia, Maria; Peña Gutiérrez, Sara; Garcia Gómez, Pablo; Royo Royo, Santiago (2023-11-01)
      Article
      Open Access
      This paper focuses on the experimental characterization of the polarization behavior of light backscattered through fog. A polarimetric orthogonal state contrast imager and an active, purely polarized white illuminator ...
    • Imagen multiespectral polarizada para el diagnóstico del cáncer de piel 

      Rey Barroso, Laura; Burgos Fernández, Francisco Javier; Díaz Douton, Fernando; Peña Gutiérrez, Sara; Royo Royo, Santiago; Ares Rodríguez, Miguel; Puig, Susana; Malvehy Guilera, Josep; Pellacani, Giovanni; Vilaseca Ricart, Meritxell (Universidad de Jaén, 2019)
      Conference lecture
      Restricted access - publisher's policy
    • Medida de superficies 3D mediante imagen polarimétrica 

      Peña Gutiérrez, Sara; Maynou Ribas, Paula; Ballesta Garcia, Maria; Royo Royo, Santiago (Comité de Optoelectrónica, 2021)
      Conference lecture
      Restricted access - publisher's policy
      La polarización de la luz reflejada en un objeto aporta información sobre su índice de refracción, su rugosidad, y también de su forma. Así, esta propiedad de la luz puede ser útil en visión artificial para recuperar la ...
    • Método de calibración de una cámara CMOS comercial para su uso como cámara polarimétrica 

      Peña Gutiérrez, Sara; Ballesta Garcia, Maria; Royo Royo, Santiago (Universidad de Zaragoza (UZA), 2019)
      Conference lecture
      Restricted access - publisher's policy
      La imagen polarimétrica puede mejorar notablemente el contraste de un objeto, ampliando la información detectada de la escena mediante imágenes de intensidad convencionales. La información obtenida, además, es complementaria ...
    • Novel melanoma diagnosis and prognosis methods based on 3D fringe projection 

      Peña Gutiérrez, Sara (Universitat Politècnica de Catalunya, 2016-06-29)
      Bachelor thesis
      Open Access
      This project aims to find an effective and non-invasive methodology to assist in the diagnosis of skin lesions using 3D profile features.
    • Optical technologies for the improvement of skin cancer diagnosis: a review 

      Rey Barroso, Laura; Peña Gutiérrez, Sara; Yáñez Alvarado, Carlos René; Burgos Fernández, Francisco Javier; Vilaseca Ricart, Meritxell; Royo Royo, Santiago (Multidisciplinary Digital Publishing Institute (MDPI), 2021-01-02)
      Article
      Open Access
      The worldwide incidence of skin cancer has risen rapidly in the last decades, becoming one in three cancers nowadays. Currently, a person has a 4% chance of developing melanoma, the most aggressive form of skin cancer, ...
    • Optimization study of plasmonic photothermal cancer therapy with multimodal numerical simulations 

      Peña Gutiérrez, Sara (Universitat Politècnica de Catalunya, 2017-09-07)
      Master thesis
      Restricted access - confidentiality agreement
    • Polarimetric imaging vs. conventional imaging: evaluation of image contrast in fog 

      Ballesta Garcia, Maria; Peña Gutiérrez, Sara; Val Martí, Aina; Royo Royo, Santiago (2021-06-24)
      Article
      Open Access
      We compare conventional intensity imaging against different modes of polarimetric imaging by evaluating the image contrast of images taken in a controlled foggy environment. A small-scale fog chamber has been designed and ...
    • Polarization calibration assessment for a broadband imaging polarimeter based on a division of aperture architecture 

      Peña Gutiérrez, Sara; Royo Royo, Santiago (2023-01-30)
      Article
      Open Access
      This article intends to provide all the experimental insights and analyze the best polarimetric calibration method for a division of aperture polarimetric imager considering the different implications it has on the ...
    • Polarization memory effect: imaging through scattering media 

      Peña Gutiérrez, Sara; Royo Royo, Santiago (2021-05-13)
      Conference lecture
      Open Access
    • Polarized multispectral imaging for the diagnosis of skin cancer 

      Rey Barroso, Laura; Burgos Fernández, Francisco Javier; Royo Royo, Santiago; Puig, Susana; Malvehy Guilera, Josep; Pellacani, Giovanni; Delpueyo, Xana; Peña Gutiérrez, Sara; Díaz Douton, Fernando; Vilaseca Ricart, Meritxell (Society for Imaging Science and Technology (IS&T), 2019)
      Conference lecture
      Restricted access - publisher's policy
      The effective and non-invasive diagnosis of skin cancer is a hot topic in biophotonics since the current gold standard, a biopsy, is slow and costly. Non-invasive optical techniques such as polarization and multispectral ...
    • Quantitative demonstration of the superiority of circularly polarized light in fog environments 

      Peña Gutiérrez, Sara; Ballesta Garcia, Maria; García Gómez, Pablo; Royo Royo, Santiago (2022-01-15)
      Article
      Open Access
      The polarization behavior of light transmitted through scattering media is studied quantitatively. A division of focal plane (DOFP) imaging polarimeter modified with a wideband quarter-wave plate (QWP) is used to evaluate ...