Ara es mostren els items 1-16 de 16

  • 3D object reconstruction from Swissranger sensor data using a spring-mass model 

    Dellen, Babette; Alenyà Ribas, Guillem; Foix Salmerón, Sergi; Torras, Carme (INSTICC Press. Institute for Systems and Technologies of Information, Control and Communication, 2009)
    Capítol de llibre
    Accés restringit per política de l'editorial
    We register close-range depth images of objects using a Swissranger sensor and apply a spring-mass model for 3D object reconstruction. The Swissranger sensor delivers depth images in real time which have, compared with ...
  • 3D sensor planning framework for leaf probing 

    Foix Salmerón, Sergi; Alenyà Ribas, Guillem; Torras, Carme (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Text en actes de congrés
    Accés obert
    Modern plant phenotyping requires active sensing technologies and particular exploration strategies. This article proposes a new method for actively exploring a 3D region of space with the aim of localizing special areas ...
  • Exploitation of time-of-flight (ToF) cameras 

    Foix Salmerón, Sergi; Alenyà Ribas, Guillem; Torras, Carme (2010)
    Report de recerca
    Accés obert
    This technical report reviews the state-of-the art in the field of ToF cameras, their advantages, their limitations, and their present-day applications sometimes in combination with other sensors. Even though ToF cameras ...
  • Indoor and outdoor depth imaging of leaves with time-of-flight and stereo vision sensors: analysis and comparison 

    Kazmi, Wajahat; Foix Salmerón, Sergi; Alenyà Ribas, Guillem; Andersen, Hans Jørgen (2014-02-01)
    Article
    Accés obert
    In this article we analyze the response of Time-of-Flight (ToF) cameras (active sensors) for close range imaging under three different illumination conditions and compare the results with stereo vision (passive) sensors. ...
  • Information-gain view planning for free-form object reconstruction with a 3D ToF camera 

    Foix Salmerón, Sergi; Kriegel, Simon; Fuchs, Stefan; Alenyà Ribas, Guillem; Torras, Carme (Springer, 2012)
    Text en actes de congrés
    Accés obert
    Active view planning for gathering data from an unexplored 3D complex scenario is a hard and still open problem in the computer vision community. In this paper, we present a general task-oriented approach based on an ...
  • Lock-in time-of-flight (ToF) cameras: a survey 

    Foix Salmerón, Sergi; Alenyà Ribas, Guillem; Torras, Carme (2011)
    Article
    Accés obert
    This paper reviews the state-of-the art in the field of lock-in ToF cameras, their advantages, their limitations, the existing calibration methods, and the way they are being used, sometimes in combination with other ...
  • 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 ...
  • Plant leaf imaging using time of flight camera under sunlight, shadow and room conditions 

    Kazmi, Wajahat; Foix Salmerón, Sergi; Alenyà Ribas, Guillem (2012)
    Text en actes de congrés
    Accés obert
    In this article, we analyze the effects of ambient light on Time of Flight (ToF) depth imaging for a plant’s leaf in sunlight, shadow and room conditions. ToF imaging is sensitive to ambient light and we try to find the ...
  • Robotic leaf probing via segmentation of range data into surface patches 

    Alenyà Ribas, Guillem; Dellen, Babette; Foix Salmerón, Sergi; Torras, Carme (2012)
    Text en actes de congrés
    Accés obert
    We present a novel method for the robotized probing of plant leaves using Time-of-Flight (ToF) sensors. Plant images are segmented into surface patches by combining a segmentation of the infrared intensity image, provided ...
  • Robotized plant probing: leaf segmentation utilizing time-of-flight data 

    Alenyà Ribas, Guillem; Dellen, Babette; Foix Salmerón, Sergi; Torras, Carme (2013)
    Article
    Accés obert
    Supervision of long-lasting extensive botanic experiments is a promising robotic application that some recent technological advances have made feasible. Plant modeling for this application has strong demands, particularly ...
  • Segmenting color images into surface patches by exploiting sparse depth data 

    Dellen, Babette; Alenyà Ribas, Guillem; Foix Salmerón, Sergi; Torras, Carme (2011)
    Text en actes de congrés
    Accés obert
    We present a new method for segmenting color images into their composite surfaces by combining color segmentation with model-based fitting utilizing sparse depth data, acquired using time-of-flight (Swissranger, PMD CamCube) ...
  • Task-oriented viewpoint planning for free-form objects 

    Foix Salmerón, Sergi (Universitat Politècnica de Catalunya, 2016-07-28)
    Tesi
    Accés obert
    This thesis deals with active sensing and its use in real exploration tasks under both scene ambiguities and measurement uncertainties. While object modeling is the implicit objective of most of active sensing algorithms, ...
  • ToF cameras for active vision in robotics 

    Alenyà Ribas, Guillem; Foix Salmerón, Sergi; Torras, Carme (2014)
    Article
    Accés obert
    ToF cameras are now a mature technology that is widely being adopted to provide sensory input to robotic applications. Depending on the nature of the objects to be perceived and the viewing distance, we distinguish two ...
  • ToF cameras for eye-in-hand robotics 

    Alenyà Ribas, Guillem; Foix Salmerón, Sergi; Torras, Carme (2015)
    Capítol de llibre
    Accés restringit per política de l'editorial
    A Time-of-Flight (ToF) camera is a relatively new type of sensor that delivers 3-dimensional images at high frame rate, simultaneously providing intensity data and range information for every pixel. It has been used in a ...
  • Towards plant monitoring through next best view 

    Foix Salmerón, Sergi; Alenyà Ribas, Guillem; Torras, Carme (IOS Press, 2011)
    Text en actes de congrés
    Accés obert
    Monitoring plants using leaf feature detection is a challenging perception task because different leaves, even from the same plant, may have very different shapes, sizes and deformations. In addition, leaves may be ...
  • Using ToF and RGBD cameras for 3D robot perception and manipulation in human environments 

    Alenyà Ribas, Guillem; Foix Salmerón, Sergi; Torras, Carme (Springer, 2014-10-01)
    Article
    Accés obert
    Robots, traditionally confined into factories, are nowadays moving to domestic and assistive environments, where they need to deal with complex object shapes, deformable materials, and pose uncertainties at human pace. To ...