Now showing items 1-20 of 84

    • 3D human action recognition in multiple view scenarios 

      Canton Ferrer, Cristian; Casas Pla, Josep Ramon; Pardàs Feliu, Montse; Sargin, M E; Tekalp, A M (Universitat Politècnica de Catalunya (UPC), 2006)
      Conference report
      Open Access
      This paper presents a novel view-independent approach to the recognition of human gestures of several people in low resolution sequences from multiple calibrated cameras. In contraposition with other multi-ocular ...
    • 3D point cloud segmentation using a fully connected conditional random field 

      Lin, Xiao; Casas Pla, Josep Ramon; Pardàs Feliu, Montse (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference lecture
      Restricted access - publisher's policy
      Traditional image segmentation methods working with low level image features are usually difficult to adapt to higher level tasks, such as object recognition and scene understanding. Object segmentation emerges as a new ...
    • 3D point cloud video segmentation based on interaction analysis 

      Lin, Xiao; Casas Pla, Josep Ramon; Pardàs Feliu, Montse (Springer, 2016-11-24)
      Part of book or chapter of book
      Open Access
      Given the widespread availability of point cloud data from consumer depth sensors, 3D segmentation becomes a promising building block for high level applications such as scene understanding and interaction analysis. It ...
    • 3D point cloud video segmentation based on interaction analysis 

      Lin, Xiao; Casas Pla, Josep Ramon; Pardàs Feliu, Montse (Springer, 2016)
      Conference lecture
      Open Access
      Given the widespread availability of point cloud data from consumer depth sensors, 3D segmentation becomes a promising building block for high level applications such as scene understanding and interaction analysis. It ...
    • 3D point cloud video segmentation oriented to the analysis of interactions 

      Lin, Xiao; Casas Pla, Josep Ramon; Pardàs Feliu, Montse (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference lecture
      Open Access
      Given the widespread availability of point cloud data from consumer depth sensors, 3D point cloud segmentation becomes a promising building block for high level applications such as scene understanding and interaction ...
    • A closed-loop approach for tracking a humanoid robot using particle filtering and depth data 

      Martínez González, Pablo Arturo; Lin, Xiao; Castelan, Mario; Casas Pla, Josep Ramon; Arechavaleta, Gustavo (Springer, 2017-05-24)
      Article
      Open Access
      Humanoid robots introduce instabilities during biped march that complicate the process of estimating their position and orientation along time. Tracking humanoid robots may be useful not only in typical applications such ...
    • A compact 3D representation for multi-view video 

      Salvador Marcos, Jordi; Casas Pla, Josep Ramon (2011)
      Conference report
      Restricted access - publisher's policy
      This paper presents a methodology for obtaining a 3D reconstruction of a dynamic scene in multi-camera settings. Our target is to derive a compact representation of the 3D scene which is effective and accurate, whatever ...
    • A feature-based subband coding scheme 

      Casas Pla, Josep Ramon; Torres Urgell, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 1996)
      Conference report
      Restricted access - publisher's policy
      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 new approach to texture coding using stochastic vector quantization 

      Gimeno, D; Torres Urgell, Lluís; Casas Pla, Josep Ramon (IEEE Computer Society, 1994)
      Conference report
      Open Access
      A new method for texture coding which combines 2-D linear prediction and stochastic vector quantization is presented in this paper. To encode a texture, a linear predictor is computed first. Next, a codebook following the ...
    • A real-time body tracking system for smart rooms 

      Alcoverro Vidal, Marcel; López Méndez, Adolfo; Casas Pla, Josep Ramon; Pardàs Feliu, Montse (2011)
      Conference report
      Restricted access - publisher's policy
      We present a real-time human body tracking system for a single user in a Smart Room scenario. In this paper we propose a novel system that involves a silhouette-based cost function using variable windows, a hierarchical ...
    • A region-based subband coding scheme 

      Casas Pla, Josep Ramon; Torres Urgell, Lluís (1997-07)
      Article
      Restricted access - publisher's policy
      This paper describes a region-based subband coding scheme intended for efficient representation of the visual information contained in image regions of arbitrary shape. QMF filters are separately applied inside each region ...
    • Acoustic event detection based on feature-level fusion of audio and video modalities 

      Butko, Taras; Canton Ferrer, Cristian; Segura Perales, Carlos; Giró Nieto, Xavier; Nadeu Camprubí, Climent; Hernando Pericás, Francisco Javier; Casas Pla, Josep Ramon (HINDAWI, 2011-03-15)
      Article
      Open Access
      Acoustic event detection (AED) aims at determining the identity of sounds and their temporal position in audio signals. When applied to spontaneously generated acoustic events, AED based only on audio information shows a ...
    • An efficient technique of texture representation in segmentation-based image coding schemes 

      Torres Urgell, Lluís; Casas Pla, Josep Ramon; Campins, J (IEEE IEEE, 1995)
      Conference report
      Open Access
      In segmentation-based image coding techniques the image to be compressed is first segmented. Then, the information is coded describing the shape and the interior of the regions. A new method to encode the texture obtained ...
    • Approximate partitioning of observations in hierarchical particle filter body tracking 

      López Méndez, Adolfo; Alcoverro Vidal, Marcel; Pardàs Feliu, Montse; Casas Pla, Josep Ramon (2011)
      Conference report
      Restricted access - publisher's policy
      This paper presents a model-based hierarchical particle filtering algorithm to estimate the pose and anthropometric parameters of humans in multi-view environments. Our method incorporates a novel likelihood measurement ...
    • Audiovisual event detection towards scene understanding 

      Canton Ferrer, Cristian; Butko, Taras; Segura, C.; Giró Nieto, Xavier; Nadeu Camprubí, Climent; Hernando Pericás, Francisco Javier; Casas Pla, Josep Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2009)
      Conference report
      Restricted access - publisher's policy
      Acoustic events produced in meeting environments may contain useful information for perceptually aware interfaces and multimodal behavior analysis. In this paper, a system to detect and recognize these events from a ...
    • Audiovisual head orientation estimation with particle filtering in multisensor scenarios 

      Canton Ferrer, Cristian; Segura Perales, Carlos; Casas Pla, Josep Ramon; Pardàs Feliu, Montse; Hernando Pericás, Francisco Javier (2008-01)
      Article
      Open Access
      This article presents a multimodal approach to head pose estimation of individuals in environments equipped with multiple cameras and microphones, such as SmartRooms or automatic video conferencing. Determining the individuals ...
    • Calibration with concurrent PT axes 

      Sánchez-Riera, Jordi; Salvador Marcos, Jordi; Casas Pla, Josep Ramon (2009-02)
      Conference report
      Open Access
      The introduction of active (pan-tilt-zoom or PTZ) cameras in Smart Rooms in addition to fixed static cameras allows to improve resolution in volumetric reconstruction, adding the capability to track smaller objects ...
    • Can our TV robustly understand human gestures? Real-Time Gesture Localization in Range Data 

      López Méndez, Adolfo; Casas Pla, Josep Ramon (ACM Press. Association for Computing Machinery, 2012)
      Conference report
      Restricted access - publisher's policy
      The 'old' remote falls short of requirements when confronted with digital convergence for living room displays. Enriched options to watch, manage and interact with content on large displays demand improved means of ...
    • Coding of details in very low bit-rate video systems 

      Casas Pla, Josep Ramon; Torres Urgell, Lluís (1994-06)
      Article
      Open Access
      In this paper, the importance of including small image features at the initial levels of a progressive second generation video coding scheme is presented. It is shown that a number of meaningful small features called details ...
    • Collaborative voting of 3D features for robust gesture estimation 

      van Sabben Alsina, Daniel; Ruiz Hidalgo, Javier; Suau Cuadros, Xavier; Casas Pla, Josep Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference lecture
      Open Access
      Human body analysis raises special interest because it enables a wide range of interactive applications. In this paper we present a gesture estimator that discriminates body poses in depth images. A novel collaborative ...