Exploració per tema "Image reconstruction"

Ara es mostren els items 1-20 de 43

    • A dual network for super-resolution and semantic segmentation of sentinel-2 imagery 

      Abadal Lloret, Sauc; Salgueiro Romero, Luis Fernando; Marcello Ruiz, Javier; Vilaplana Besler, Verónica (Multidisciplinary Digital Publishing Institute (MDPI), 2021-11-12)
      Article
      Accés obert
      There is a growing interest in the development of automated data processing workflows that provide reliable, high spatial resolution land cover maps. However, high-resolution remote sensing images are not always affordable. ...

    • A feature-based subband coding scheme 

      Casas Pla, Josep Ramon; Torres Urgell, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 1996)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A feature-based subband coding scheme is presented. It is intended for the coding of the texture component of a two-component image model. The primary component contains the strong edges, individually described by their ...

    • A novel reconstruction algorithm for the improvement of SMOS brightness temperatures 

      González Gambau, Veronica; Turiel, Antonio; Martinez, Justino; Olmedo, Edson; Corbella Sanahuja, Ignasi (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      RFI (Radio Frequency Interference) sources, Sun signal and even land-sea transitions may generate large sidelobes that corrupt SMOS brightness temperature products and therefore, the quality of the soil moisture and sea ...

    • A robust motion estimation and segmentation approach to represent moving images with layers 

      Torres Urgell, Lluís; García Luque, David; MATES, A (IEEE COMPUTER SOCIETY, 1997)
      Text en actes de congrés
      Accés obert
      The paper provides a robust representation of moving images based on layers. To that goal, we have designed efficient motion estimation and segmentation techniques by affine model fitting suitable for the construction of ...

    • AIterative algorithm for microwave imaging using the cgm-fft and the pseudoinverse method 

      Mallorquí Franquet, Jordi Joan; Llorens, V (Institute of Electrical and Electronics Engineers (IEEE), 1994)
      Text en actes de congrés
      Accés obert
      Within biomedical microwave tomography, a spatial iterative method for the reconstruction of the complex permittivity of inhomogeneous lossy dielectric objects with arbitrary shape from their scattered electric field is ...

    • An FFT-based CLEAN deconvolution method for interferometric microwave radiometers with spatially variable beam pattern 

      Sugihara El Maghraby, Ahmed Kiyosi; Hyuk, Park; Camps Carmona, Adriano José; Grubišic, Angelo; Colombo, Camilla; Tatnall, Adrian (Institute of Electrical and Electronics Engineers (IEEE), 2021-02-01)
      Article
      Accés restringit per política de l'editorial
      A modification to the extended CLEAN deconvolution method for passive microwave interferometric radiometers is presented to account for the interferometer beam patterns that vary depending on the source position within the ...

    • An octree isosurface codification based on discrete planes 

      Boada, Imma; Navazo Álvaro, Isabel (2001)
      Text en actes de congrés
      Accés obert
      Describes a method to code a decimated model of an isosurface on an octree representation while maintaining volume data if it is needed. The proposed technique is based on grouping the marching cubes (MC) patterns into ...

    • Analysis of methods for generating octree models of objects from their silhouettes 

      Franquesa Niubó, Marta; Brunet Crosa, Pere (1997-01)
      Article
      Accés restringit per política de l'editorial
      Reconstructing 3D models from their projection images has been an interesting research topic in computer vision and geometric modeling. In this paper, we review several methods that generate octree models of objects from ...

    • Antiextensive connected operators for image and sequence processing 

      Salembier Clairon, Philippe Jean; Oliveras Vergés, Albert; Garrido Ostermann, Luis (1998-04)
      Article
      Accés obert
      This paper deals with a class of morphological operators called connected operators. These operators filter the signal by merging its flat zones. As a result, they do not create any new contours and are very attractive for ...

    • Automatic 3D character reconstruction from frontal and lateral monocular 2D RGB views 

      Beacco Porres, Alejandro; Gallego Vila, Jaime; Slater, Mel (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Text en actes de congrés
      Accés obert
      We present an automatic animatable 3D character reconstruction method from frontal and lateral RGB pictures of the person to reconstruct. We propose a method where, after obtaining a 3D reconstruction from a frontal view, ...

    • Benefits of applying nodal sampling to SMOS data over semi-enclosed seas and strongly RFI-contaminated regions 

      González Gambau, Verónica; Olmedo, Estrella; Martinez, J.; Turiel, Antonio; Corbella Sanahuja, Ignasi; Oliva, Roger; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Radio Frequency Interferences (RFI) are still an important source of contamination in SMOS data. The application of nodal sampling (NS) to brightness temperature images helps to mitigate the degradation that RFIs produce ...

    • Connected operators based on region-tree pruning strategies 

      Salembier Clairon, Philippe Jean; Garrido Ostermann, Luis (Barcelona, 2000)
      Comunicació de congrés
      Accés obert
      This paper discusses region-based representations useful to create connected operators. The filtering approach involves three steps: 1) a region tree representation of the input image is constructed; 2) the simplification ...

    • Database of "in vivo" measurements for quantitative microwave imaging and reconstruction algorithms available 

      Mallorquí Franquet, Jordi Joan; Joachimowicz, N.; Bolomey, J. C. (Jean-Charles); Broquetas Ibars, Antoni (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1995-10-01)
      Article
      Accés obert
      Reconstruction algorithms and equipment have been developed for microwave imaging, with emphasis on noninvasive control of deep hyperthermia treatments. Tomographic reconstruction algorithms have also been developed for ...

    • Digital Twins for medieval monuments: requirements from art historians and technical challenges for analysis and restoration 

      Muñoz Pandiella, Imanol; Bosch Geli, Carles; Guardia Pons, Milagros; Cayuela Vellido, Begoña; Pogliani, Paola; Bordi, Giulia; Paschali, Maria; Andújar Gran, Carlos Antonio; Charalambous, Panayiotis (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
      Accés obert
      Research on Visual Computing and Cultural Heritage naturally requires the involvement of multidisciplinary teams comprising art historians and technical experts. Despite the vast literature on digital 3D models in support ...

    • Edge versus contrast estimation of morphological filters 

      Salembier Clairon, Philippe Jean (ICASSP, 1993)
      Text en actes de congrés
      Accés obert
      The estimation properties of morphological filters are considered in terms of edge localization and grey level contrast preservation in two-dimensional spaces. It is shown that, at least in practice, a compromise between ...

    • Efficient algorithms for boundary extraction of 2D and 3D orthogonal pseudomanifolds 

      Vigo Anglada, Marc; Pla García, Núria; Ayala Vallespí, M. Dolors; Martínez Bayona, Jonàs (2011)
      Report de recerca
      Accés obert
      In this paper we present algorithms to extract the boundary representation of orthogonal polygons and polyhedra, either manifold or pseudomanifold. The algorithms we develop reconstruct not only the polygons of the boundaries ...

    • Fast single image defogging with robust sky detection 

      Salazar Colores, Sebastián; Moya Sánchez, E. Ulises; Ramos Arreguín, Juan-Manuel; Cabal Yépez, Eduardo; Flores, Gerardo; Cortés García, Claudio Ulises (Institute of Electrical and Electronics Engineers (IEEE), 2020-08-11)
      Article
      Accés obert
      Haze is a source of unreliability for computer vision applications in outdoor scenarios, and it is usually caused by atmospheric conditions. The Dark Channel Prior (DCP) has shown remarkable results in image defogging with ...

    • Flat zones filtering, connected operators, and filters by reconstruction 

      Salembier Clairon, Philippe Jean; Serra i Aguadé, Josep (1995-08)
      Article
      Accés obert
      This correspondence deals with the notion of connected operators. Starting from the definition for operator acting on sets, it is shown how to extend it to operators acting on function. Typically, a connected operator ...

    • Image restoration using HOS and the Radon transform 

      Sayrol Clols, Elisa; Nikias, C L; Gasull Llampallas, Antoni (IEEE IEEE PRESS, 1993)
      Text en actes de congrés
      Accés obert
      The authors propose the use of higher-order statistics (HOS) to study the problem of image restoration. They consider images degraded by linear or zero phase blurring point spread functions (PSF) and additive Gaussian ...

    • Image restoration using HOS and the Radon transform 

      Sayrol Clols, Elisa; Chrysostomos, Nikias; Gasull Llampallas, Antoni (. IEEE, 1993)
      Text en actes de congrés
      Accés obert
      The authors propose the use of higher-order statistics (HOS) to study the problem of image restoration. They consider images degraded by linear or zero phase blurring point spread functions (PSF) and additive Gaussian ...