Browsing by Author "Loncomilla, Patricio"

Now showing items 1-15 of 15

    • A New Approach for Fingerprint Verification Based on Wide Baseline Matching Using Local Interest Points and ... 
      Ruiz del Solar, Javier; Loncomilla, Patricio; Devia, Christ (Springer-Verlag, 2007)
      In this article is proposed a new approach to automatic fingerprint verification that is not based on the standard ridge-minutiae-based framework, but in a general-purpose wide baseline matching methodology. Instead of ...
    • An Automated Refereeing and Analysis Tool for the Four-Legged League 
      Ruiz del Solar, Javier; Loncomilla, Patricio; Vallejos, Paul (Springer-Verlag, 2007)
      The aim of this paper is to propose an automated refereeing and analysis tool for robot soccer. This computer vision based tool can be applied for diverse tasks such as: (i) automated game refereeing, (ii) computer-bas ...
    • Applying SIFT Descriptors to Stellar Image Matching 
      Ruiz del Solar, Javier; Loncomilla, Patricio; Zorzi Avendaño, Pablo Ignacio (Springer-Verlag, 2008)
      Stellar image matching allows to verify if a given pair of images belongs to the same stellar object/area, or knowing that they correspond to the same sky area, to verify if there are some changes between them due to ...
    • Estimating tonal prosodic discontinuities in Spanish using HMM 
      Bassi Acuña, Alejandro; Becerra Yoma, Néstor; Loncomilla, Patricio (ELSEVIER, 2006-09)
      The tonal prosodic discontinuity estimation in Spanish is exhaustively modelled using HMM. Due to the high morphological complexity in Spanish, a relatively coarse grammatical categorization is tested in two sorts of texts ...
    • A fast probabilistic model for hypothesis rejection in SIFT-based object recognition 
      Loncomilla, Patricio; Ruiz del Solar, Javier (SPRINGER-VERLAG BERLIN, 2006)
      This paper proposes an improvement over the traditional SIFT-based object recognition methodology proposed by Lowe [3]. This improvement corresponds to a fast probabilistic model for hypothesis rejection (affine solution ...
    • Fingerprint Verification Using Local Interest Points and Descriptors 
      Ruiz del Solar, Javier; Loncomilla, Patricio; Devia, Christ (Springer-Verlag, 2008)
      A new approach to automatic fingerprint verification based on a general- purpose wide baseline matching methodology is here proposed. The approach is not based on the standard ridge-minutiae-based framework. Instead ...
    • Gaze direction determination of opponents and teammates in robot soccer 
      Loncomilla, Patricio; Ruiz del Solar, Javier (SPRINGER-VERLAG BERLIN, 2006)
      Gaze direction determination of opponents and teammates is a very important ability for any soccer player, human or robot. However, this ability is still not developed in any of the RoboCup soccer leagues. We aim at reverting ...
    • A Novel Methodology for Assessing the Fall Risk Using Low-Cost and Off-the-Shelf Devices 
      Loncomilla, Patricio; Tapia, Claudio; Daud Albasini, Omar; Ruíz del Solar San Martín, Javier (IEEE, 2014)
      Early detection of fall risk can reduce health costs associated with surgery, rehabilitation, imaging studies, hospitalizations, and medical evaluations. This paper proposes a measurement-focused study oriented to ...
    • Offline Signature Verification Using Local Interest Points and Descriptors 
      Ruiz del Solar, Javier; Devia, Christ; Loncomilla, Patricio; Concha, Felipe (Springer-Verlag, 2008)
      In this article, a new approach to offline signature verification, based on a general-purpose wide baseline matching methodology, is proposed. Instead of detecting and matching geometric, signature-dependent features, ...
    • Play ball! Robot Detection System in the Soccer Domain 
      Ruiz del Solar, Javier; Verschae, Rodrigo; Arenas, Matías; Loncomilla, Patricio (IEEE, 2010-12)
    • Robot Head Pose Detection and Gaze Direction Determination Using Local Invariant Features 
      Ruiz del Solar, Javier; Loncomilla, Patricio (2009)
      Gaze direction determination can be a powerful anticipatory perceptual mechanism for determining the next action of other individuals, humans or robots. It can allow cooperation, synchronization or competition between robots. ...
    • Robust Object Recognition using Wide Baseline Matching for RoboCup Applications 
      Loncomilla, Patricio; Ruiz del Solar, Javier (2012-12-18)
      As the RoboCup leagues evolve, higher requirements (e.g. object recognition skills) are imposed over the robot vision systems, which cannot be fulfilled using simple mechanisms as pure color segmentation or visual sonar. ...
    • Thermal Face Recognition using Local Interest Points and Descriptors for HRI Applications 
      Hermosilla, Gabriel; Loncomilla, Patricio; Ruiz del Solar, Javier (2012-12-18)
      In this article a robust thermal face recognition methodology based on the use of local interest points and descriptors, is proposed. The methodology consists of the following stages: face segmentation, vascular network ...
    • Visual detection of legged robots and its application to robot soccer playing and refereeing 
      Ruiz del Solar, Javier; Arenas, Matías; Verschae, Rodrigo; Loncomilla, Patricio (2012-12-18)
      The visual detection of robots is a difficult but relevant problem in several robotic applications. In the present article, a framework for the robust and fast visual detection of legged-robots is proposed. This framework ...
    • Visual SLAM Based on Rigid-Body 3D Landmarks 
      Loncomilla, Patricio; Ruiz del Solar, Javier (Springer, 2012)
      In current visual SLAM methods, pointlike landmarks (As in Filliat and Meyer (Cogn Syst Res 4(4):243–282, 2003), we use this expression to denote a landmark generated by a point or an object considered as punctual.) ...