Ara es mostren els items 62-81 de 97

    • Object modeling using a ToF camera under an uncertainty reduction approach 

      Foix Salmerón, Sergi; Alenyà Ribas, Guillem; Andrade-Cetto, Juan; Torras, Carme (2010)
      Text en actes de congrés
      Accés obert
      Time-of-Flight (ToF) cameras deliver 3D images at 25 fps, offering great potential for developing fast object modeling algorithms. Surprisingly, this potential has not been extensively exploited up to now. A reason for ...
    • Object recognition 

      Andrade-Cetto, Juan; Villamizar Vergel, Michael Alejandro (John Wiley & Sons, 2007)
      Capítol de llibre
      Accés obert
      Object recognition entails identifying instances of known objects in sensory data by searching for a match between features in a scene and features on a model. The key elements that make object recognition feasible are the ...
    • Observability analysis and optimal sensor placement in stereo radar odometry 

      Corominas Murtra, Andreu; Vallvé Navarro, Joan; Solà Ortega, Joan; Flores Abad, Ismael; Andrade-Cetto, Juan (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés obert
      Localization is the key perceptual process closing the loop of autonomous navigation, allowing self-driving vehicles to operate in a deliberate way. To ensure robust localization, autonomous vehicles have to implement ...
    • Odometry estimation for aerial manipulation 

      Santamaria Navarro, Àngel; Solà Ortega, Joan; Andrade-Cetto, Juan (Springer, 2019)
      Capítol de llibre
      Accés obert
      This chapter explains a fast and low-cost state localization estimation method for small-sized UAVs, that uses an IMU, a smart camera and an infrared time-of-flight range sensor that act as an odometer providing absolute ...
    • On the observability of bearing only SLAM 

      Vidal Calleja, Teresa; Bryson, Mitch; Sukkarieh, Salah; Sanfeliu Cortés, Alberto; Andrade-Cetto, Juan (IEEE, 2007)
      Text en actes de congrés
      Accés obert
      In this paper we present an observability analysis for a mobile robot performing SLAM with a single monocular camera. The aim is to get a better understanding of the well known intuitive behavior of these systems, such as ...
    • Outdoor delayed-state visually augmented odometry 

      Illa, Viorela Simona; Andrade-Cetto, Juan; Sanfeliu Cortés, Alberto (IFAC, 2007)
      Text en actes de congrés
      Accés obert
      This paper presents an efficient approach to outdoor visually augmented odometry. The technique computes relative pose constraints via a robust least squares minimisation of 3D point correspondences, which are in turn ...
    • Outdoor delayed-state visually augmented odometry 

      Ila, Viorela Simona; Andrade-Cetto, Juan; Sanfeliu Cortés, Alberto (s. n., 2007)
      Text en actes de congrés
      Accés obert
      This paper presents an efficient approach to outdoor visually augmented odometry. The technique computes relative pose constraints via a robust least squares minimisation of 3D point correspondences, which are in turn ...
    • Path planning in belief space with Pose SLAM 

      Valencia Carreño, Rafael; Andrade-Cetto, Juan; Porta Pleite, Josep Maria (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The probabilistic belief networks that result from standard feature-based simultaneous localization and map building cannot be directly used to plan trajectories. The reason is that they produce a sparse graph of landmark ...
    • Path planning with pose SLAM 

      Valencia Carreño, Rafael; Andrade-Cetto, Juan; Porta Pleite, Josep Maria (2010)
      Report de recerca
      Accés obert
      The probabilistic belief networks that result from standard feature-based simultaneous localization and map building (SLAM) approaches cannot be directly used to plan trajectories. The reason is that they produce a sparse ...
    • Planning reliable paths with Pose SLAM 

      Valencia Carreño, Rafael; Morta Garriga, Martí; Andrade-Cetto, Juan; Porta Pleite, Josep Maria (2013)
      Article
      Accés obert
      The maps that are built by standard feature-based simultaneous localization and mapping (SLAM) methods cannot be directly used to compute paths for navigation, unless enriched with obstacle or traversability information, ...
    • Pose-graph SLAM sparsification using factor descent 

      Vallvé Navarro, Joan; Solà Ortega, Joan; Andrade-Cetto, Juan (2019-09-01)
      Article
      Accés obert
      Since state of the art simultaneous localization and mapping (SLAM) algorithms are not constant time, it is often necessary to reduce the problem size while keeping as much of the original graph’s information content. In ...
    • Potential information fields for mobile robot exploration 

      Vallvé Navarro, Joan; Andrade-Cetto, Juan (2015-07-01)
      Article
      Accés obert
      We present a decision theoretic approach to mobile robot exploration. The method evaluates the reduction of joint path and map entropy and computes a potential information field in robot configuration space using these ...
    • Recovering the epipolar direction from two affine views of a planar object 

      Alberich Carramiñana, Maria; Alenyà Ribas, Guillem; Andrade-Cetto, Juan; Martinez, Elisa; Torras, Carme (Academic Press, 2008)
      Article
      Accés obert
      The mainstream approach to estimate epipolar geometry from two views requires matching the projections of at least 4 non-coplanar points in the scene, assuming a full projective camera model. Our work deviates from this ...
    • Reduced state representation in delayed-state SLAM 

      Ila, Viorela Simona; Porta Pleite, Josep Maria; Andrade-Cetto, Juan (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-10-11)
      Comunicació de congrés
      Accés obert
      This paper introduces an approach that reduces the size of the state and maximizes the sparsity of the information matrix in exactly sparse delayed-state SLAM. We propose constant time procedures to measure the ...
    • Registration of 3d point clouds for urban robot mapping 

      Teniente Avilés, Ernesto; Andrade-Cetto, Juan (2008)
      Report de recerca
      Accés obert
      We consider the task of mapping pedestrian urban areas for a robotic guidance and surveillance application. This mapping is performed by registering three-dimensional laser range scans acquired with two different robots. To ...
    • Robust color contour object detection invariant to shadows 

      Scandaliaris, Jorge; Villamizar Vergel, Michael Alejandro; Andrade-Cetto, Juan; Sanfeliu Cortés, Alberto (Springer Verlag, 2007)
      Capítol de llibre
      Accés obert
      In this work a new robust color and contour based object detection method in images with varying shadows is presented. The method relies on a physics-based contour detector that emphasizes material changes and a contour-based ...
    • Segmentation of dynamic objects from laser data 

      Ortega Jiménez, Agustín Alberto; Andrade-Cetto, Juan (2011)
      Text en actes de congrés
      Accés obert
      We present a method to segment dynamic objects from high-resolution low-rate laser scans. Data points are tagged as static or dynamic based on the classification of pixel data from registered imagery. Per-pixel background ...
    • Shared random Ferns for efficient detection of multiple categories 

      Villamizar Vergel, Michael Alejandro; Moreno-Noguer, Francesc; Andrade-Cetto, Juan; Sanfeliu Cortés, Alberto (2010)
      Text en actes de congrés
      Accés obert
      We propose a new algorithm for detecting multiple object categories that exploits the fact that different categories may share common features but with different geometric distributions. This yields an efficient detector ...
    • Simultaneous pose, focal length and 2D-to-3D correspondences from noisy observations 

      Peñate Sanchez, Adrián; Serradell, Eduard; Andrade-Cetto, Juan; Moreno-Noguer, Francesc (2013)
      Text en actes de congrés
      Accés obert
      Simultaneously recovering the camera pose and correspondences between a set of 2D-image and 3D-model points is a difficult problem, especially when the 2D-3D matches cannot be established based on appearance only. The ...
    • Task priority control for aerial manipulation 

      Santamaria Navarro, Àngel; Lippiello, Vincenzo; Andrade-Cetto, Juan (2014)
      Text en actes de congrés
      Accés obert
      This paper presents a task oriented control strategy for aerial vehicles equipped with a manipulator. A camera is attached to the end-effector of the manipulator to perform a primary task consisting on visual servoing ...