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Ara es mostren els items 60-79 de 100

    • Object detection and segmentation on a hierarchical region-based image representation 

      Vilaplana Besler, Verónica; Marqués Acosta, Fernando; León Cristóbal, Míriam; Gasull Llampallas, Antoni (2010)
      Comunicació de congrés
      Accés obert
      In this paper we present a general framework for object detection and segmentation. Using a bottom-up unsupervised merging algorithm, a region-based hierarchy that represents the image at different resolution levels is ...

    • Object retrieval with deep convolutional features 

      Mohedano, Eva; Salvador Aguilera, Amaia; McGuinness, Kevin; Giró Nieto, Xavier; O'Connor, Noel; Marqués Acosta, Fernando (IOS Press, 2017-11-23)
      Capítol de llibre
      Accés restringit per política de l'editorial
      Deep learning and image processing are two areas of great interest to academics and industry professionals alike. The areas of application of these two disciplines range widely, encompassing fields such as medicine, robotics, ...

    • Object-based evaluation of hierarchical region-based representations based on information theory statistical measures 

      Calderero Patino, Felipe; Marqués Acosta, Fernando (IEEE Computer Society Publications, 2008)
      Text en actes de congrés
      Accés obert
      This work presents an evaluation in terms of object representation of the hierarchical region-based representations created by a family of general statistical region merging algorithms. These merging techniques are based ...

    • Obtencion de un esqueleto morfologico sin puntos redundantes 

      Marqués Acosta, Fernando; Gasull Llampallas, Antoni; Torres Urgell, Lluís (1991)
      Text en actes de congrés
      Accés obert
      Skeleton is a powerful method to describe binary images. Although there are different possibilities to define a skeleton, is very common to use morphological skeleton because it is easy and fast for implementation purposes. ...

    • Partition coding using multi-grid chain code and motion compensation 

      Marqués Acosta, Fernando; Gasull Llampallas, Antoni (IEEE, 1996)
      Text en actes de congrés
      Accés obert
      In this paper, a lossy partition coding technique is presented which leads to decoded partitions with unnoticeable losses. It uses a hexagonal grid for contour representation and it is based on the concept of multi-grid ...

    • Partition tree for a segmentation-based video coding system 

      Pardàs Feliu, Montse; Salembier Clairon, Philippe Jean; Marqués Acosta, Fernando; Morros, R (Institute of Electrical and Electronics Engineers (IEEE), 1996)
      Text en actes de congrés
      Accés obert
      In this paper we describe a very low bit rate video coding system that belongs to the class of object based coding systems. The system takes advantage of homogeneity in both gray level and motion, trying to use the most ...

    • Partition-based image representation as basis for user-assisted segmentation 

      Marqués Acosta, Fernando; Marcotegui Iturmendi, Beatriz; Zanoguera, Francisca; Correia Fernandez-Pereira, Paulo; Mech, R.; Wollborn, M (Institute of Electrical and Electronics Engineers (IEEE), 2000)
      Text en actes de congrés
      Accés obert
      This paper discusses the usefulness of a partition-based image representation in the context of user-assisted segmentation, and compares it with the two other most common image representations in this framework: pixel-based ...

    • Performance evaluation of probability density estimators for unsupervised information theoretical region merging 

      Calderero Patino, Felipe; Marqués Acosta, Fernando; Ortega, Antonio (2009)
      Comunicació de congrés
      Accés obert
      Information theoretical region merging techniques have been shown to provide a state-of-the-art unified solution for natural and texture image segmentation. Here, we study how the segmentation results can be further ...

    • Processament del senyal - Col.lecció de Problemes 

      Hernando Pericás, Francisco Javier; Lagunas Hernandez, Miguel A.; Marqués Acosta, Fernando; Mariño Acebal, José Bernardo; Monte Moreno, Enrique; Nadeu Camprubí, Climent; Oliveras Vergés, Albert; Rodríguez Fonollosa, Javier; Torres Urgell, Lluís; Vázquez Grau, Gregorio; Vidal Manzano, José (Universitat Politècnica de Catalunya, 2003)
      Problema, exercici
      Accés obert

    • Quantitative ultrasound texture analysis of fetal lungs to predict neonatal respiratory morbidity 

      Bonet-Carne, Elisenda; Palacio, M.; Cobo, T.; Perez-Moreno, A.; Lopez, M.; Piraquive, J.P.; Ramirez, J.C.; Botet, F.; Marqués Acosta, Fernando; Gratacos, E. (Wiley (John Wiley & Sons), 2015)
      Article
      Accés obert
      Objective To develop and evaluate the performance of a novel method for predicting neonatal respiratory morbidity based on quantitative analysis of the fetal lung by ultrasound. Methods More than 13¿000 non-clinical ...

    • Real-time user independent hand gesture recognition from time-of-flight camera video using static and dynamic models 

      Molina, Javier; Escudero-Viñolo, Marcos; Bescós Cano, Jesús; Signorelo, Alessandro; Pardàs Feliu, Montse; Ferran, Christian; Marqués Acosta, Fernando; Martínez, José Maria (2011-08-06)
      Article
      Accés restringit per política de l'editorial
      The use of hand gestures offers an alternative to the commonly used human computer interfaces, providing a more intuitive way of navigating among menus and multimedia applications. This paper presents a system for hand ...

    • Recent Trends in Video Sequence Analysis 

      Garrido Ostermann, Luis; Marqués Acosta, Fernando; Pardàs Feliu, Montse; Salembier Clairon, Philippe Jean; Vilaplana Besler, Verónica (B. Macq, 1997)
      Text en actes de congrés
      Accés obert
      This paper reviews and analyses the problems facing video classification. It investigates how the semantic gap can be bridged. It presents a new taxonomy for video calssifaction based on a lituture survey. It conclueds ...

    • Recurrent semantic instance semantic segmentation 

      Bellver, Míriam; Salvador Aguilera, Amaia; Campos, Víctor; Marqués Acosta, Fernando; Giró Nieto, Xavier; Torres Viñals, Jordi (Barcelona Supercomputing Center, 2018-04-24)
      Text en actes de congrés
      Accés obert

    • Recursive image sequence segmentation by hierarchical models 

      Marqués Acosta, Fernando; VERA, V; Gasull Llampallas, Antoni (. IEEE COMPUTER SOCIETY PRESS., 1994)
      Text en actes de congrés
      Accés obert
      This paper addresses the problem of image sequence segmentation. A technique using a sequence model based on compound random fields is presented. This technique is recursive in the sense that frames are processed in the ...

    • Region merging techniques using information theory statistical measures 

      Calderero Patino, Felipe; Marqués Acosta, Fernando (2010-06)
      Text en actes de congrés
      Accés obert
      Abstract—The purpose of the current work is to propose, under a statistical framework, a family of unsupervised region merging techniques providing a set of the most relevant region-based explanations of an image at different ...

    • Region-based annotation tool using partition trees 

      Giró Nieto, Xavier; Camps Hernando, Neus; Marqués Acosta, Fernando (CEUR Workshop Proceedings, 2007)
      Comunicació de congrés
      Accés obert
      This paper presents an annotation tool for the manual and region-based annotation of still images. The selection of regions is achieved by navigating through a Partition Tree, a data structure that offers a multiscale ...

    • Region-based caption text extraction 

      León Cristóbal, Miriam; Vilaplana Besler, Verónica; Gasull Llampallas, Antoni; Marqués Acosta, Fernando (Springer, 2013)
      Article
      Accés obert
      This chapter presents a method for caption text detection. The proposed method will be included in a generic indexing system dealing with other semantic concepts which are to be automatically detected as well. To have a ...

    • Region-based caption text extraction 

      León Cristóbal, Míriam; Vilaplana Besler, Verónica; Gasull Llampallas, Antoni; Marqués Acosta, Fernando (Springer, 2013)
      Capítol de llibre
      Accés restringit per política de l'editorial
      This chapter presents a method for caption text detection. The proposed method will be included in a generic indexing system dealing with other semantic concepts which are to be automatically detected as well. To have a ...

    • Region-based caption text extraction 

      León Cristóbal, Míriam; Vilaplana Besler, Verónica; Gasull Llampallas, Antoni; Marqués Acosta, Fernando (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
      Text en actes de congrés
      Accés obert
      This paper presents a method for caption text detection. The proposed method will be included in a generic indexing system dealing with other semantic concepts which are to be automatically detected as well. To have a ...

    • Region-based particle filter for video object segmentation 

      Varas González, David; Marqués Acosta, Fernando (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      We present a video object segmentation approach that extends the particle filter to a region-based image representation. Image partition is considered part of the particle filter measurement, which enriches the available ...