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Ara es mostren els items 65-84 de 90

    • Real-time 3D multi-person tracking using Monte Carlo surface sampling 

      Canton Ferrer, Cristian; Casas Pla, Josep Ramon; Pardàs Feliu, Montse (2010)
      Text en actes de congrés
      Accés obert
      The current paper presents a low-complexity approach to the problem of simultaneous tracking of several people in low resolution sequences from multiple calibrated cameras. Redundancy among cameras is exploited to ...

    • Real-time detection of overloads on the plasma-facing components of Wendelstein 7-X 

      Puig Sitjes, Aleix; Jakubowski, Marcin; Naujoks, Dirk; Gao, Yu; Drewelow, Peter; Niemann, Holger; Fellinger, Joris; Casas Pla, Josep Ramon; Salembier Clairon, Philippe Jean; Clemente Bonjour, Rocco (Multidisciplinary Digital Publishing Institute, 2021-12-16)
      Article
      Accés obert
      Wendelstein 7-X (W7-X) is the leading experiment on the path of demonstrating that stellarators are a feasible concept for a future power plant. One of its major goals is to prove quasi-steady-state operation in a ...

    • Real-time fingertip localization conditioned on hand gesture classification 

      Suau, Xavier; Alcoverro Vidal, Marcel; López-Méndez, Adolfo; Ruiz Hidalgo, Javier; Casas Pla, Josep Ramon (2014-05-09)
      Article
      Accés restringit per política de l'editorial
      A method to obtain accurate hand gesture classification and fingertip localization from depth images is proposed. The Oriented Radial Distribution feature is utilized, exploiting its ability to globally describe hand poses, ...

    • Real-time head and hand tracking based on 2.5D data 

      Suau Cuadros, Xavier; Ruiz Hidalgo, Javier; Casas Pla, Josep Ramon (2012-06)
      Article
      Accés restringit per política de l'editorial
      A novel real-time algorithm for head and hand tracking is proposed in this paper. This approach is based on data from a range camera, which is exploited to resolve ambiguities and overlaps. The position of the head is ...

    • Real-time head and hand tracking based on 2.5D data 

      Suau Cuadros, Xavier; Casas Pla, Josep Ramon; Ruiz Hidalgo, Javier (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A novel real-time algorithm for head and hand tracking is proposed in this paper. This approach is based on 2.5D data from a range camera, which is exploited to resolve ambiguities and overlaps. Experimental results show ...

    • Real-time upper body tracking with online initialization using a range sensor 

      López Méndez, Adolfo; Alcoverro Vidal, Marcel; Pardàs Feliu, Montse; Casas Pla, Josep Ramon (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      We present a novel method for upper body pose estimation with online initialization of pose and the anthropometric profile. Our method is based on a Hierarchical Particle Filter that defines its likelihood function with ...

    • Registration of images to unorganized 3D point clouds using contour cues 

      Pujol Miró, Alba; Ruiz Hidalgo, Javier; Casas Pla, Josep Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Text en actes de congrés
      Accés obert
      Low resolution commercial 3D sensors contribute to computer vision tasks even better when the analysis is carried out in a combination with higher resolution image data. This requires registration of 2D images to ...

    • Representing and retrieving regions using binary partition trees 

      Garrido Ostermann, Luis; Salembier Clairon, Philippe Jean; Casas Pla, Josep Ramon (Institute of Electrical and Electronics Engineers (IEEE), 1999)
      Text en actes de congrés
      Accés obert
      This paper discusses the interest of Binary Partition Trees for image and region representation in the context of indexing and similarity based retrieval. Binary Partition Trees concentrate in a compact and structured way ...

    • Research and state-of-the-art algorithms of event-related activities for human monitoring 

      López Méndez, Adolfo; Casas Pla, Josep Ramon (2009-03-01)
      Report de recerca
      Accés restringit per acord de confidencialitat
      In this report we analyze state-of-the-art algorithms for human monitoring in generic environments and we focus on video monitoring of human activity. The objective is to define the basis upon which the ACTIBIO dataset ...

    • Research on state-of-the art algorithms for Human detection and tracking in controlled environments and recommendations for system development 

      López Méndez, Adolfo; Casas Pla, Josep Ramon; Huang, Xiaxi; Boulgouris, Nicolaos V. (2008-11-01)
      Report de recerca
      Accés restringit per acord de confidencialitat
      The present document aims at reviewing the state-of-the-art algorithms for human detection and tracking that are relevant to ACTIBIO objectives. The document is split into two main parts: Human Detection and Human Body Tracking

    • Residual image coding using mathematical morphology 

      Casas Pla, Josep Ramon; Torres Urgell, Lluís (1994)
      Text en actes de congrés
      Accés obert
      A new method for the extraction, selection and coding of perceptually significant image components in a video sequence is presented. It has been applied to the coding residues of a segmentation-based multilevel coding ...

    • Segmentation based coding of textures using stochastic vector quantization 

      Torres Urgell, Lluís; Casas Pla, Josep Ramon; Diego, de S (1994)
      Text en actes de congrés
      Accés obert
      In second generation image compression techniques the image to be compressed is first segmented. The pixels are divided into mutually exclusive spatial regions based on some criteria. After segmentation, the image consists ...

    • Segmentation-based multi-scale edge extraction to measure the persistence of features in unorganized point clouds 

      Bazazian, Dena; Casas Pla, Josep Ramon; Ruiz Hidalgo, Javier (2017)
      Text en actes de congrés
      Accés obert
      Edge extraction has attracted a lot of attention in computer vision. The accuracy of extracting edges in point clouds can be a significant asset for a variety of engineering scenarios. To address these issues, we propose ...

    • Single image defogging and evaluation with deep neural networks without the need of ground truth 

      Mas Giménez, Gerard de; Garcia Gómez, Pablo; Casas Pla, Josep Ramon; Royo Royo, Santiago (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2023)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      Fog, haze, or smoke are usual atmospheric phenomena that dramatically compromise the overall visibility of any scene, critically affecting features such as illumination, contrast, and contour detection of objects. The ...

    • Skeleton and shape adjustment and tracking in multicamera environments 

      Alcoverro Vidal, Marcel; Casas Pla, Josep Ramon; Pardàs Feliu, Montse (2010-07)
      Article
      Accés restringit per política de l'editorial
      In this paper we present a method for automatic body model adjustment and motion tracking in multicamera environments.We introduce a set of shape deformation parameters based on linear blend skinning, that allow a deformation ...

    • SLAM-based 3D outdoor reconstructions from lidar data 

      Caminal Colell, Ivan; Casas Pla, Josep Ramon; Royo Royo, Santiago (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés obert
      The use of depth (RGBD) cameras to reconstruct large outdoor environments is not feasible due to lighting conditions and low depth range. LIDAR sensors can be used instead. Most state of the art SLAM methods are devoted ...

    • Spatio-temporal alignment and hyperspherical radon transform for 3D gait recognition in multi-view environments 

      Canton Ferrer, Cristian; Casas Pla, Josep Ramon; Pardàs Feliu, Montse (2010)
      Text en actes de congrés
      Accés obert
      This paper presents a view-invariant approach to gait recognition in multi-camera scenarios exploiting a joint spatio-temporal data representation and analysis. First, multi-view information is employed to generate a 3D ...

    • Stochastic vector quantization of images 

      Torres Urgell, Lluís; Casas Pla, Josep Ramon; Arias, E (1997-11)
      Article
      Accés restringit per política de l'editorial
      One of the most important steps in the vector quantization of images is the design of the codebook. The codebook is generally designed using the LBG algorithm, that is in essence a clustering algorithm which uses a large ...

    • Strong edge features for image coding 

      Casas Pla, Josep Ramon; Torres Urgell, Lluís (P. MARAGOS, R.W. SCHAFER KLUWER ACADEMIA PUBLISHERS, 1996)
      Text en actes de congrés
      Accés obert
      A two-component model is proposed for perceptual image coding. For the first component of the model, the watershed operator is used to detect strong edge features. Then, an efficient morphological interpolation algorithm ...

    • Temporally coherent 3D point cloud video segmentation in generic scenes 

      Lin, Xiao; Casas Pla, Josep Ramon; Pardàs Feliu, Montse (2018-03-02)
      Article
      Accés obert
      Video segmentation is an important building block for high level applications, such as scene understanding and interaction analysis. While outstanding results are achieved in this field by the state-of-the-art learning and ...