Exploració per tema "Ellipsometry"

Ara es mostren els items 1-19 de 19

    • A fast imaging Mueller matrix polarimeter for biomedical applications 

      Rahman, Sheikh Fareya (Universitat Politècnica de Catalunya, 2022-09-07)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   Universitat Autònoma de Barcelona / Institut de Ciències Fotòniques (ICFO) / Karlsruher Institut für Technologie
      A Mueller Matrix Polarimeter is a device that measures the Mueller matrix of a sample, giving quantitative information on the change in the state of polarization light upon interaction with the sample. It measures the ...

    • 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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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 ...

    • Análisis de técnicas basadas en árboles de partición binaria aplicadas a PoISAR 

      Alonso González, Alberto (Universitat Politècnica de Catalunya, 2009-09-07)
      Projecte/Treball Final de Carrera
      Accés obert

    • Cancellation of scattering mechanisms in PolInSAR: application to underlying topography estimation 

      López Martínez, Carlos; Papathanassiou, Kostantinos (IEEE Press. Institute of Electrical and Electronics Engineers, 2013-02)
      Article
      Accés restringit per política de l'editorial
      This paper investigates the polarimetric dependence of the interferometric complex correlation and proposes amethodology for cancelling individual scattering mechanisms, in terms of the complex correlation coefficient ...

    • DInSAR processing with polarimetric data 

      Monells Miralles, Daniel (Universitat Politècnica de Catalunya, 2011-09-09)
      Projecte Final de Màster Oficial
      Accés obert
      English: Study of the uses of orbital polarimetric data for the survey of terrain subsidence through SAR Differential interferometry (DInSAR).

    • 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
      Accés obert
      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 ...

    • Imaging polarimetry for bio applications 

      Aguado Guaita, Sara (Universitat Politècnica de Catalunya, 2021-09-08)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   Universitat de Barcelona / Universitat Autònoma de Barcelona
      Polarimetric imaging is especially interesting for the fields of biology and medicine due to the capability of this technique to emphasize certain abnormalities in tissue such as cancerous growths that can interact differently ...

    • Improving wishart classification of polarimetric SAR data using the hopfield neural network optimization approach 

      Pajares Martinsanz, Gonzalo; López Martínez, Carlos; Sánchez Lladó, Francisco Javier; Molina, Iñigo (2012-11-19)
      Article
      Accés restringit per política de l'editorial
      This paper proposes the optimization relaxation approach based on the analogue Hopfield Neural Network (HNN) for cluster refinement of pre-classified Polarimetric Synthetic Aperture Radar (PolSAR) image data. We consider ...

    • Indices of polarimetric purity: application in biological tissue 

      Rodríguez Mangues, Carla; van Eeckhout Alsinet, Albert; Garcia Caurel, Enrique; Gil Pérez, José Jorge; Garnatje, Teresa; González Arnay, Emilio; Vidal Gonzalez, Josep; Escalera, Juan Carlos; Moreno Soriano, Ignacio; Campos Coloma, Juan; Lizana Tutusaus, Angel (2021-05-13)
      Comunicació de congrés
      Accés obert

    • Low temperature back-surface-field contacts deposited by hot-wire CVD for heterojunction solar cells 

      Muñoz Cervantes, Delfina; Voz Sánchez, Cristóbal; Martín García, Isidro; Orpella García, Alberto; Alcubilla González, Ramón; Villar, F; Bertomeu Balaguero, Joan; Andreu Batallé, Jordi; Roca-I-Cabarrocas, P (2008-08)
      Article
      Accés obert
      The growing interest in using thinner wafers (< 200 µm) requires the development of low temperature passivation strategies for the back contact of heterojunction solar cells. In this work, we investigate low temperature ...

    • Magneto-optical Kerr effect measurement at low temperatures 

      Vlašín, Ondřej (Universitat Politècnica de Catalunya, 2008-09-05)
      Projecte Final de Màster Oficial
      Accés obert
      Ellipsometry is particularly attractive for its suitability for in-situ measurements and remarkable sensitivity to minute inter-facial effects, such as the formation of sub-monolayer of atoms or magneto-optical (MO) effect. ...

    • Medida de superficies 3D mediante imagen polarimétrica 

      Peña Gutiérrez, Sara; Maynou Ribas, Paula; Ballesta Garcia, Maria; Royo Royo, Santiago (Comité de Optoelectrónica, 2021)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      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 ...

    • 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
      Accés obert
      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 ...

    • Polsar time series temporal change detection and analysis with binary partition trees 

      Alonso González, Alberto; López Martínez, Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper the exploitation of PolSAR temporal series datasets is presentedin the context of change detection and characterization. A Binary Partition Tree (BPT) data structure is employed in order to extract homogeneous ...

    • Statistical study of the H/A/Alpha decomposition based on a perturbation analysis of the coherency matrix 

      López Martínez, Carlos; Alonso González, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The eigendecomposition of the coherency matrix, as well as the Entropy, Anisotropy and mean Alpha angle are crucial for the physical understanding of the scattered echo in SAR polarimetry. This contribution considers a ...

    • Study of the speckle noise effects over the eigen decomposition of polarimetric SAR data: a review 

      López Martínez, Carlos; Alonso González, Alberto; Fabregas Canovas, Francisco Javier (European Space Agency (ESA), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper is focused on considering the effects of speckle noise on the eigen decomposition of the co- herency matrix. Based on a perturbation analysis of the matrix, it is possible to obtain an analytical expression ...

    • Underlying topography estimation and separation of scattering contributions over forests based on polInSAR data 

      López Martínez, Carlos; Alonso González, Alberto; Fabregas Canovas, Francisco Javier; Papathanassiou, Kostantinos (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The work detailed in this paper analyzes the topographic phase retrieval process on forested areas by means of Polarimetric Interferometric SAR data. On the basis of the Random Volume over Ground scattering model, an ...