Now showing items 61-75 of 75

    Appearance-based mapping and localization using feature stability histograms for mobile robot navigation 

    Bacca Cortés, Eval Bladimir (Date of defense: 2012-06-20)

    This work proposes an appearance-based SLAM method whose main contribution is the Feature Stability Histogram (FSH). The FSH is built using a voting schema, if the feature is re-observed, it will be promoted; otherwise it ...

    Path planning with homotopic constraints for autonomous underwater vehicles 

    Hernàndez Bes, Emili (Date of defense: 2012-06-15)

    This thesis addresses the path planning problem for Autonomous Underwater Vehicles (AUVs) using homotopy classes to provide topological information on how paths avoid obstacles. Looking for a path within a homotopy class ...

    Computer vision techniques for early detection of skin cancer 

    Quintana Plana, Josep (Date of defense: 2012-06-14)

    This thesis investigates the problem of developing new computer vision techniques for early detection of skin cancer. The first part of this work presents a novel methodology to correct color reproduction in dermatological ...

    Robustness against large-scale failures in communications networks 

    Segovia Silvero, Juan (Date of defense: 2011-12-15)

    This thesis studies robustness against large-scale failures in communications networks. If failures are isolated, they usually go unnoticed by users thanks to recovery mechanisms. However, such mechanisms are not effective ...

    A mission control system for an autonomous underwater vehicle 

    Palomeras Rovira, Narcís (Date of defense: 2011-12-19)

    The presented work focuses on the theoretical and practical aspects concerning the design and development of a formal method to build a mission control system for autonomous underwater vehicles bringing systematic design ...

    Efficient topology estimation for large scale optical mapping 

    Elibol, Armagan (Date of defense: 2011-07-29)

    Large scale image mosaicing methods are in great demand among scientists who study different aspects of the seabed, and have been fostered by impressive advances in the capabilities of underwater robots in gathering optical ...

    Manifold clustering for motion segmentation 

    Zappella, Luca (Date of defense: 2011-06-30)

    En aquesta tesi s’estudia el problema de la segmentació del moviment. La tesi presenta una revisió dels principals algoritmes de segmentació del moviment, s’analitzen les característiques principals i es proposa una ...

    Gradient-based reinforcement learning techniques for underwater robotics behavior learning 

    El-Fakdi Sencianes, Andrés (Date of defense: 2011-03-03)

    Darrerament, l'interès pel desenvolupament d'aplicacions amb robots submarins autònoms (AUV) ha crescut de forma considerable. Els AUVs són atractius gràcies al seu tamany i el fet que no necessiten un operador humà per ...

    Efficient 3D scene modeling and mosaicing 

    Nicosevici, Tudor (Date of defense: 2009-12-18)

    El modelat d'escenes és clau en un gran ventall d'aplicacions que van des de la generació mapes fins a la realitat augmentada. Aquesta tesis presenta una solució completa per a la creació de models 3D amb textura. En ...

    Improving resource utilization in carrier ethernet technologies 

    Caro Perez, Luis Fernando (Date of defense: 2010-01-19)

    Ethernet está empezando a pasar de las redes de área local a una red de transporte. Sin embargo, como los requisitos de las redes de transporte son más exigentes, la tecnología necesita ser mejorada. Esquemas diseñados ...

    Entorno de aprendizaje virtual adaptativo soportado por un modelo de usuario integral 

    Vélez Ramos, Jeimy Beatriz (Date of defense: 2009-11-11)

    El objetivo de esta tesis es mejorar la efectividad y eficiencia de los entornos de aprendizaje virtual. Para lograr este propósito se define un Modelo de Usuario que considera las características del usuario, el contexto ...

    Large-Scale Surface registration 

    Batlle Subirós, Elisabet (Date of defense: 2008-12-19)

    The first part of this work presents an accurate analysis of the most relevant 3D registration techniques, including initial pose estimation, pairwise registration and multiview registration strategies. A new classification ...

    Underwater slam for estructured environments using and imaging sonar 

    Ribas Romagós, David (Date of defense: 2008-09-29)

    Aquesta tesi tracta sobre el problema de la navegació per a vehicles submarins autònoms que operen en entorns artificials estructurats com ara ports, canals, plataformes marines i altres escenaris similars. A partir ...

    Admission control schemes for TCP elastic traffic in class-based networks 

    Fàbrega i Soler, Lluís (Date of defense: 2008-07-11)

    En aquesta tesi proposem dos esquemes de xarxa amb control d'admissió per al trànsit elàstic TCP amb mecanismes senzills. Ambdós esquemes són capaços de proporcionar throughputs diferents i aïllament entre fluxos, on un ...

    Label space reduction in GMPLs and All-Optical Label Swapping networks 

    Solano Donado, Fernando (Date of defense: 2007-12-04)

    All-Optical Label Swapping (AOLS) es una tecnología clave para la implementación de nodos de conmutación completamente óptica de paquetes. Sin embargo, el costo de su desarrollo es proporcional al tamaño del espacio de ...