Exploració per autor "López Martínez, Carlos"
Ara es mostren els items 75-94 de 131
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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 obertThis 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 ... -
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 obertThis 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. ... -
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'editorialIn 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 -
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 obertIn 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 ... -
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 obertSpeckle 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 obertIn 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)
Text en actes de congrés
Accés restringit per política de l'editorialSpeckle 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'editorialA 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)
Text en actes de congrés
Accés restringit per política de l'editorialOrbital 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'editorialIn 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)
Text en actes de congrés
Accés obertIn 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)
Text en actes de congrés
Accés restringit per política de l'editorialIn 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 obertThe 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 obertSynthetic 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 SAR time series change analysis over agricultural areas
Alonso González, Alberto; López Martínez, Carlos; Papathanassiou, Kostantinos; Hajnsek, Irena (Institute of Electrical and Electronics Engineers (IEEE), 2020-10)
Article
Accés obertThis article proposes a change detection and analysis technique for monitoring the phenological development of agricultural vegetation by means of multitemporal Polarimetric Synthetic Aperture Radar (PolSAR) acquisitions. ... -
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 obertQuantitative 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)
Text en actes de congrés
Accés obert -
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'editorialRevisiting 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)
Comunicació de congrés
Accés restringit per política de l'editorialThis 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) ...