Ara es mostren els items 43-62 de 87

  • Modeling and reduction of SAR interferometric phase noise in the wavelet domain 

    López Martínez, Carlos; Fabregas Canovas, Francisco Javier (IEEE Press. Institute of Electrical and Electronics Engineers, 2002-12)
    Article
    Accés obert
    This paper addresses the problem of interferometric phase noise reduction in synthetic aperture radar interferometry. A new phase noise model in the complex domain is introduced and validated by using both simulated and ...
  • 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)
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    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 speckle noise model 

    López Martínez, Carlos; Fabregas Canovas, Francisco Javier; Pottier, Eric (Hindawi Publishing Corporation., 2005-12-31)
    Article
    Accés obert
  • On the extension of multidimensional speckle noise model from single-look to multilook SAR imagery 

    López Martínez, Carlos; Pottier, Eric (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-02-28)
    Article
    Accés obert
    Speckle noise represents one of the major problems when synthetic aperture radar (SAR) data are considered. Despite the fact that speckle is caused by the scattering process itself, it must be considered as a noise source ...
  • On the use of the l(2)-norm for texture analysis of polarimetric SAR data 

    Deng, xinping; López Martínez, Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2016-11-01)
    Article
    Accés obert
    In this paper, the use of the l2-norm, or Span, of the scattering vectors is suggested for texture analysis of polarimetric synthetic aperture radar (SAR) data, with the benefits that we need neither an analysis of the ...
  • Past and new trends in polarimetric and multidimensional SAR data Speckle noise filtering 

    López Martínez, Carlos; Alonso González, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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    Speckle noise represents one of the main components of the multidimensional SAR signal that limit the complete exploitation of multidimensional SAR data, and polarimetric SAR data in particular. This paper consider the ...
  • Perturbation analysis of eigenvector-based target decomposition theorems in radar polarimetry 

    López Martínez, Carlos; Alonso González, Alberto; Fabregas Canovas, Francisco Javier (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Article
    Accés restringit per política de l'editorial
    A novel analysis of the statistics of the eigendecomposition of the coherency matrix and the H/A/a¯ parameters of polarimetric synthetic aperture radar data is addressed. The objective is to overcome previous approaches ...
  • Phase quality optimization in Orbital Differential SAR Interferometry with fully polarimetric data 

    Monells Miralles, Daniel; Iglesias González, Rubén; Mallorquí Franquet, Jordi Joan; Fabregas Canovas, Francisco Javier; López Martínez, Carlos (IEEE, 2012)
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    Orbital Differential SAR Interferometry (DInSAR) is a well-known technique to retrieve terrain deformation phenomena from wide areas with high resolution. Historically its application has been limited to single polarization ...
  • Phase quality optimization in polarimetric differential SAR interferometry 

    Iglesias González, Rubén; Monells Miralles, Daniel; Fabregas Canovas, Francisco Javier; Mallorquí Franquet, Jordi Joan; Aguasca Solé, Alberto; López Martínez, Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2014-05)
    Article
    Accés restringit per política de l'editorial
    In this paper, a study of polarimetric optimization techniques in the frame of differential synthetic aperture radar (SAR) interferometry (DInSAR) is considered. Historically, DInSAR techniques have been limited to the ...
  • Polarimetric coherence optimization for interferometric differential applications 

    Pipia, Luca; Fabregas Canovas, Francisco Javier; Aguasca Solé, Alberto; López Martínez, Carlos; Mallorquí Franquet, Jordi Joan (2009)
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    In this paper, the potentials of polarimetric coherenceoptimization techniques for differential interferometric SAR (DInSAR) applications are examined. For this purpose, the cutting-edge approaches available in the ...
  • Polarimetric optimization for DInSAR pixel selection with ground-based SAR 

    Iglesias González, Rubén; Fabregas Canovas, Francisco Javier; Aguasca Solé, Alberto; López Martínez, Carlos; Alonso González, Alberto; Mallorquí Franquet, Jordi Joan (IEEE, 2012)
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    In this paper, the study of polarimetric optimization techniques for Differential SAR Interferometry (DInSAR) applications is analyzed. This work has been carried out in the framework of deformation map retrieval on ...
  • Polarimetric optimization of temporal sublook coherence for DInSAR applications 

    Iglesias González, Rubén; Monells Miralles, Daniel; López Martínez, Carlos; Mallorquí Franquet, Jordi Joan; Fabregas Canovas, Francisco Javier; Aguasca Solé, Alberto (2015-01-01)
    Article
    Accés obert
    The application of differential synthetic aperture radar interferometry (DInSAR) techniques has been traditionally limited to the single-polarimetric case. The launch of satellites with polarimetric capabilities has triggered ...
  • Polarimetric SAR Speckle Noise Model 

    López Martínez, Carlos; Fabregas Canovas, Francisco Javier (IEEE Institute Electrical Electronics Engineers INC, 2003-10-31)
    Article
    Accés obert
    Synthetic aperture radar (SAR) data are affected by speckle noise, originated by the SAR system’s coherent nature. The problem of speckle noise in one-dimensional (1-D) data is already solved, as speckle has a multiplicative ...
  • Polarimetric speckle noise effects in quantitative physical parameters retrieval 

    López Martínez, Carlos; Hajnsek, I.; Lee, J. S.; Pottier, Eric; Fabregas Canovas, Francisco Javier (IEE-INST ELEC ENG, 2006-06-30)
    Article
    Accés obert
    Quantitative estimation of physical parameters of the Earth's surface is currently an active area of research. Multidimensional synthetic aperture radar (SAR) systems appear in this framework as a tool capable of performing ...
  • Polarimetric techniques for SAR contrast and resolution enhancement 

    López Martínez, Carlos; Fabregas Canovas, Francisco Javier; Broquetas Ibars, Antoni; Krogager, E (Institute of Electrical and Electronics Engineers (IEEE), 1999)
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  • Polarimetric temporal analysis of urban environments with a ground-based SAR 

    Pipia, Luca; Fabregas Canovas, Francisco Javier; Aguasca Solé, Alberto; López Martínez, Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2013-04)
    Article
    Accés restringit per política de l'editorial
    Revisiting time constitutes a key constraint for continuous monitoring activities based on space- and airborne synthetic aperture radar (SAR) acquisitions. Conversely, the employment of terrestrial platforms overcomes ...
  • PolInSAR temporal series analysis with Binary Partition Trees 

    Alonso González, Alberto; López Martínez, Carlos (VDE Conference Publications, 2014)
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    This work is focused on the exploitation of PolSAR and PolInSAR temporal series datasets, in the context of change detection and characterization. Instead of a classical pixel-based approach, a Binary Partition Tree (BPT) ...
  • PolSAR and PolInSAR model based information estimation 

    López Martínez, Carlos; Fabregas Canovas, Francisco Javier; Pipia, Luca (2009)
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    Speckle for multidimensional SAR data may be modeled as the combination of multiplicative and additive noise sources. As demonstrated, the use of this noise model does not corrupt the estimation of physical information ...
  • PolSAR time series processing with Binary Partition Trees 

    Alonso González, Alberto; López Martínez, Carlos; Salembier Clairon, Philippe Jean (Institute of Electrical and Electronics Engineers (IEEE), 2014-06-01)
    Article
    Accés restringit per política de l'editorial
    This paper deals with the processing of polarimetric synthetic aperture radar (SAR) time series. Different approaches to deal with the temporal dimension of the data are considered, which are derived from different target ...
  • 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)
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    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 ...