Now showing items 1-13 of 13

  • 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)
    Part of book or chapter of book
    Restricted access - publisher's policy
    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 ...
  • Exploitation of time-of-flight (ToF) cameras 

    Foix Salmerón, Sergi; Alenyà Ribas, Guillem; Torras, Carme (2010)
    External research report
    Open Access
    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
    Open Access
    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)
    Conference report
    Open Access
    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
    Open Access
    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)
    Conference report
    Open Access
    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)
    Conference report
    Open Access
    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)
    Conference report
    Open Access
    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
    Open Access
    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)
    Conference report
    Open Access
    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) ...
  • ToF cameras for active vision in robotics 

    Alenyà Ribas, Guillem; Foix Salmerón, Sergi; Torras, Carme (2014)
    Article
    Open Access
    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 ...
  • Towards plant monitoring through next best view 

    Foix Salmerón, Sergi; Alenyà Ribas, Guillem; Torras, Carme (IOS Press, 2011)
    Conference report
    Open Access
    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
    Open Access
    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 ...