Ara es mostren els items 142-161 de 240

    • Local isotropy indicator for SAR image filtering: application to Envisat/ASAR images of the Doñana Wetland 

      Martí Cardona, Belén; López Martínez, Carlos; Dolz Ripollès, Josep (2015-04)
      Article
      Accés obert
      This paper explores a geometrical and computationally simple operator, named Ds, for local isotropy assessment on SAR images. It is assumed that isotropic intensity distributions in natural areas, either textured or ...
    • Local texture stationarity indicator for filtering Doñana wetlands SAR images 

      Martí Cardona, Belén; López Martínez, Carlos; Dolz Ripollès, Josep (IEEE, 2012)
      Text en actes de congrés
      Accés obert
      This paper defines a new operator, named Ds, for local texture stationarity assessment on SAR images. . The aim is to discriminate heterogeneous targets from land cover types of high normalized variance values, as those ...
    • Marine applications of SAR polarimetry 

      Margarit Martín, Gerard (Universitat Politècnica de Catalunya, 2007-07-11)
      Tesi
      Accés obert
      Els oceans mantenen una fràgil i complexa cadena que enllaça un alt nombre de factors biològics, sociològics i econòmics. Actualment, aquest ecosistema està amenaçat per l'activitat humana i uns dels punts més crítics és ...
    • Marine pollution in European coastal waters monitored by the ERS-2 SAR: a comprehensive statistical analysis 

      Gade, Martin; Redondo Apraiz, José Manuel (1999)
      Text en actes de congrés
      Accés obert
      The oil pollution of the southern Baltic Sea, the North Sea, and the northwestern Mediterranean Sea has been studied within a two-year period from December 1996 until November 1998. In total, the authors have analyzed more ...
    • Mathematical Morphology on the Sphere: Application to Polarimetric Image processing 

      Frontera Pons, Joana Maria (Universitat Politècnica de Catalunya, 2011-07-19)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   Ecole nationale supérieure des mines de Paris
      English: The fully polarimetric synthetic aperture radar (PolSAR) provides data containing the complete scattering information. Therefore, these data have drawn more attention in recent years. PolSAR data can be represented ...
    • Micrometric deformation imaging at W-Band with GBSAR 

      Martínez, Arturo; Aguasca Solé, Alberto; Lort Cuenca, Marc; Broquetas Ibars, Antoni (2017-02-17)
      Article
      Accés obert
      The paper presents the experimental evaluation of 94 GHz CW-FM Radar that can be configured as a Ground Based SAR (Synthetic Aperture Radar) for high resolution imaging and deformation control. This system has been designed ...
    • Modeling fast boat motion impact on satellite SAR MTI systems 

      Ceba Vega, Francisco; Makhoul Varona, Eduardo; Broquetas Ibars, Antoni; Zhan, Yu; Beaton, Alasdhair (2015-10-01)
      Article
      Accés obert
      This letter analyzes the problems of imaging small and fast boats with synthetic aperture radar (SAR), which may experience severe defocusing and/or smearing. This situation is encountered, inter alia, in ocean traffic ...
    • Models de reflectivitat del clutter marí per a la simulació d'imatges sar 

      Palacín López, Tània (Universitat Politècnica de Catalunya, 2015-03)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] This paper aims to explain the concept of sea reflectivity, the physical model to characterize sea clutter and effects on backscattering coefficient changes in wavelength, grazing angle, polarization and sea ...
    • Modified oriented dihedral model for scattering characteristic description with PolSAR data 

      Chen, Yifan; Zhang, Lamei; Mallorquí Franquet, Jordi Joan; Zou, Bin (Institute of Electrical and Electronics Engineers (IEEE), 2024-01-19)
      Article
      Accés obert
      Dihedral is a common structure in polarimetric SAR images and can be found on many man-made targets. Many researchers have proposed different dihedral models, but the accuracy of these models is limited. In this case, the ...
    • Monitoring changes in the coastal environment based on SAR Sentinel-1 time-series 

      Pelich, Ramona; Chini, Marco; Hostache, Renaud; Matgen, Patrick; López Martínez, Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Text en actes de congrés
      Accés obert
      This research addresses the use of Sentinel-1 time series with the aim of detecting spatio-temporal changes in the coastal environment. To this end an automatic and unsupervised coastline detection method is proposed. ...
    • Monitorización y deformaciones del terreno mediante teledetección radar 

      Fabré Argente, Sandra (Universitat Politècnica de Catalunya, 2005)
      Projecte/Treball Final de Carrera
      Accés restringit per decisió de l'autor
      Este proyecto, realizado en el Instituto de Geomática en colaboración con la unidad de Teledetección Activa, está dedicado a un particular tipo de aplicación de la teledetección: la medida de las deformaciones del terreno. El ...
    • Multidimensional and temporal SAR data representation and processing based on binary partition trees 

      Alonso González, Alberto (Universitat Politècnica de Catalunya, 2014-06-13)
      Tesi
      Accés obert
      This thesis deals with the processing of different types of multidimensional SAR data for distinct applications. Instead of handling the original pixels of the image, which correspond to very local information and are ...
    • Multidimensional SAR data analysis based on binary partition trees and the covariance matrix geometry 

      Alonso González, Alberto; López Martínez, Carlos; Salembier Clairon, Philippe Jean; Valero Valbuena, Silvia; Chanussot, Jocelyn (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper, we propose the use of the Binary Partition Tree (BPT) as a region-based and multi-scale image representation to process multidimensional SAR data, with special emphasis on polarimetric SAR data. We also ...
    • Multidimensional SAR data representation and processing based on Binary Partition Trees 

      Alonso González, Alberto (Universitat Politècnica de Catalunya, 2011-07-20)
      Projecte Final de Màster Oficial
      Accés obert
      English: A novel multidimensional SAR data abstraction is presented, based on Binary Partition Trees (BPT). This data abstraction is employed for different applications, as data filtering and segmentation, change detection, ...
    • Multidimensional speckle noise. Modelling and filtering related to sar data. 

      López Martinez, Carlos (Universitat Politècnica de Catalunya, 2003-06-02)
      Tesi
      Accés obert
      Los Radares de Apertura Sintética, o sistemas SAR, representan el mejorejemplo de sistemas activos de teledetección por microondas. Debido a su naturaleza coherente, un sistema SAR es capaz de adquirir información dedispersión ...
    • Multifractal analysis of SAR of the ocean surface, currents, eddy structure, oil slicks and diffusivity analysis 

      Redondo Apraiz, José Manuel; Grau, J.; Matulka, Anna Magdalena; Platónov, Alexéi Konstantínovich (2010)
      Comunicació de congrés
      Accés restringit per política de l'editorial
    • Multiscale analysis of SAR from the earth surface 

      Redondo Apraiz, José Manuel; Tarquis, Ana Maria; Matulka, Anna Magdalena; Platónov, Alexéi Konstantínovich (Universidad Complutense de Madrid (UCM), 2010)
      Comunicació de congrés
      Accés obert
      The use of Synthetic Aperture Radar (SAR) to investigate the earth’s surface provides a wealth of useful information. Here we will discuss some recent fractal and multi-fractal techniques used to identify oil spills and ...
    • Multitemporal SAR and polarimetric SAR optimization and classification: Reinterpreting temporal coherence 

      Ni, Jun; López Martínez, Carlos; Hu, Zhongbo; Zhang, Fan (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Article
      Accés obert
      In multitemporal synthetic aperture radar (SAR) and polarimetric SAR (PolSAR), coherence is a capital parameter to exploit common information between temporal acquisitions. Yet, its use is limited to high coherences. This ...
    • Nearly zero inclination geosynchronous SAR mission analysis with long integration time for earth observation 

      Ruiz Rodon, Josep; Broquetas Ibars, Antoni; Makhoul Varona, Eduardo; Monti Guarnieri, Andrea; Rocca, Fabio (Institute of Electrical and Electronics Engineers (IEEE), 2014-10-01)
      Article
      Accés restringit per política de l'editorial
      In this paper, the performance of a nearly zero inclination and low eccentricity geosynchronous synthetic aperture radar (GEOSAR) mission for midlatitude (30 degrees-60 degrees) Earth observation is analyzed. The slow ...
    • New methodology for shoreline extraction using optical and radar (SAR) satellite imagery 

      Zollini, Sara; Dominici, Donatella; Alicandro, Maria; Cuevas-González, Maria; Angelats Company, Eduard; Ribas Prats, Francesca; Simarro Grande, Gonzalo (Multidisciplinary Digital Publishing Institute (MDPI), 2023-03-01)
      Article
      Accés obert
      Coastal environments are dynamic ecosystems, constantly subject to erosion/accretion processes. Erosional trends have unfortunately been intensifying for decades due to anthropic factors and an accelerated sea level rise ...