3D Laser Scanner for Underwater Manipulation 

    Palomer Vila, Albert; Ridao Rodríguez, Pere; Youakim Isaac, Dina Nagui; Ribas Romagós, David; Forest Collado, Josep; Petillot, Yvan R. (2018-04-04)

    Nowadays, research in autonomous underwater manipulation has demonstrated simple applications like picking an object from the sea floor, turning a valve or plugging and unplugging a connector. These are fairly simple tasks ...

    3D Object Recognition Based on Point Clouds in Underwater Environment with Global Descriptors: A Survey 

    Himri, Khadidja; Ridao Rodríguez, Pere; Grácias, Nuno Ricardo Estrela (2019-10-14)

    This paper addresses the problem of object recognition from colorless 3D point clouds in underwater environments. It presents a performance comparison of state-of-the-art global descriptors, which are readily available ...

    3D Simplification Methods and Large Scale Terrain Tiling 

    Campos Dausà, Ricard; Quintana, Josep; García Campos, Rafael; Schmitt, Thierry; Spoelstra, George; Schaap, Dick M. A. (2020-01-30)

    This paper tackles the problem of generating world-scale multi-resolution triangulated irregular networks optimized for web-based visualization. Starting with a large-scale high-resolution regularly gridded terrain, we ...

    A behavior-based scheme using reinforcement learning for autonomous underwater vehicles 

    Carreras Pérez, Marc; Yuh, Junku; Batlle i Grabulosa, Joan; Ridao Rodríguez, Pere (2005)

    This paper presents a hybrid behavior-based scheme using reinforcement learning for high-level control of autonomous underwater vehicles (AUVs). Two main features of the presented approach are hybrid behavior coordination ...

    A Camera-Projector System for Robot Positioning by Visual Servoing 

    Pagès Marco, Jordi; Collewet, Christophe; Chaumette, François; Salvi, Joaquim (2006)

    Positioning a robot with respect to objects by using data provided by a camera is a well known technique called visual servoing. In order to perform a task, the object must exhibit visual features which can be extracted ...

    A Case-based reasoning approach to validate grammatical gender and number agreement in Spanish language 

    Bacca Acosta, Jorge Luis; Baldiris Navarro, Silvia Margarita; Fabregat Gesa, Ramon; Ávila Garzón, Cecilia (2013)

    Across Latin America 420 indigenous languages are spoken. Spanish is considered a second language in indigenous communities and is progressively introduced in education. However, most of the tools to support teaching ...

    A collection of challenging motion segmentation benchmark datasets 

    Muhammad Habib, Mahmood; Diez, Yago; Salvi, Joaquim; Lladó Bardera, Xavier (info:eu-re)

    An in-depth analysis of computer vision methodologies is greatly dependent on the benchmarks they are tested upon. Any dataset is as good as the diversity of the true nature of the problem enclosed in it. Motion segmentation ...

    A comparison of homotopic path planning algorithms for robotic applications 

    Hernàndez Bes, Emili; Carreras Pérez, Marc; Ridao Rodríguez, Pere (info:eu-re)

    This paper addresses the path planning problem for robotic applications using homotopy classes. These classes provide a topological description of how paths avoid obstacles, which is an added value to the path planning ...

    A concurrent region growing algorithm guided by circumscribed contours 

    Cufí i Solé, Xavier; Muñoz Pujol, Xavier; Freixenet i Bosch, Jordi; Martí Bonmatí, Joan (2000)

    Image segmentation of natural scenes constitutes a major problem in machine vision. This paper presents a new proposal for the image segmentation problem which has been based on the integration of edge and region information. ...

    A convolutional vision transformer for semantic segmentation of side-scan sonar data 

    Rajani, Hayat; Grácias, Nuno Ricardo Estrela; García Campos, Rafael (2023-10-15)

    Distinguishing among different marine benthic habitat characteristics is of key importance in a wide set of seabed operations ranging from installations of oil rigs to laying networks of cables and monitoring the impact ...

    A distributed environment for virtual and/or real experiments for underwater robots 

    Ridao Rodríguez, Pere; Batlle i Grabulosa, Joan; Amat i Girbau, Josep; Carreras Pérez, Marc (2001)

    This paper presents the distributed environment for virtual and/or real experiments for underwater robots (DEVRE). This environment is composed of a set of processes running on a local area network composed of three sites: ...

    A fairness load balancing algorithm in HWN using a multihoming strategy 

    Donoso Meisel, Yezid; Lozano Garzon, Carlos; Camelo Botero, Miguel Hernando; Vilà Talleda, Pere (2014-01-01)

    Due to the growth of the number of intelligent devices and the broadband requirements, between others technical requirements, of the new applications, suppose a new challenge in planning, maintenance and resource allocation ...

    A fully automated pipeline for brain structure segmentation in multiple sclerosis 

    González Villà, Sandra; Oliver i Malagelada, Arnau; Huo, Yuankai; Lladó Bardera, Xavier; Landman, Bennett A. (2020-06-04)

    Accurate volume measurements of the brain structures are important for treatment evaluation and disease follow-up in multiple sclerosis (MS) patients. With the aim of obtaining reproducible measurements and avoiding the ...

    A fully convolutional neural network for new T2-w lesion detection in multiple sclerosis 

    Salem, Mostafa; Valverde Valverde, Sergi; Cabezas Grebol, Mariano; Pareto, Deborah; Oliver i Malagelada, Arnau; Salvi, Joaquim; Rovira, Àlex; Lladó Bardera, Xavier (2020-01)

    Longitudinal magnetic resonance imaging (MRI) has an important role in multiple sclerosis (MS) diagnosis and follow-up. Specifically, the presence of new T2-w lesions on brain MR scans is considered a predictive biomarker ...

    A Label space reduction algorithm for P2MP LSPs using asymmetric tunnels 

    Solano Donado, Fernando; Fabregat Gesa, Ramon; Donoso Meisel, Yezid; Marzo i Lázaro, Josep Lluís (2005)

    The aim of traffic engineering is to optimise network resource utilization. Although several works on minimizing network resource utilization have been published, few works have focused on LSR label space. This paper ...

    A method for 6D pose estimation of free-form rigid objects using point pair features on range data 

    Vidal Verdaguer, Joel; Lin, Chyi Yeu; Lladó Bardera, Xavier; Martí Marly, Robert (2018-08-15)

    Pose estimation of free-form objects is a crucial task towards flexible and reliable highly complex autonomous systems. Recently, methods based on range and RGB-D data have shown promising results with relatively high ...

    A method to obtain the integrated contour image in colour scenes 

    Cufí i Solé, Xavier; Casals, Alícia; Batlle i Grabulosa, Joan (1997)

    This paper describes a method to achieve the most relevant contours of an image. The presented method proposes to integrate the information of the local contours from chromatic components such as H, S and I, taking into ...

    A Model for Improving the Quality of Student Internship Placements in Engineering Degrees 

    García Campos, Rafael; Puig, Jordi (2011)

    Work Internship Placements (WIP) is a new and transversal enterprise internships programme, which is focused on quality improvement, academic control and satisfaction of collaborating enterprises. This programme is addressed ...

    A Motion compensated filtering approach to remove sunlight flicker in shallow water images 

    Grácias, Nuno Ricardo Estrela; Negahdaripour, Shahriar; Neumann, László; Prados Gutiérrez, Ricard; García Campos, Rafael (2008)

    A common problem in video surveys in very shallow waters is the presence of strong light fluctuations, due to sun light refraction. Refracted sunlight casts fast moving patterns, which can significantly degrade the quality ...

    A multiple failure propagation model in GMPLS-based networks 

    Calle Ortega, Eusebi; Ripoll i Misse, Jordi; Segovia Silvero, Juan; Vilà Talleda, Pere; Manzano Castro, Marc (info:eu-re)

    In this article, a new model to simulate different failure propagation scenarios in GMPLS-based networks is proposed. Several types of failures and malfunctions may spread along the network following different patterns ...