Browsing Departament d'Arquitectura i Tecnologia de Computadors by titles

Image blending techniques and their application in underwater mosaicing

Prados Gutiérrez, Ricard (Date of defense: 02-05-2013)

The fusion of several images of the same scene into a single and larger composite is known as photo-mosaic. Unfortunately, the seams along image boundaries are often noticeable, due to photometrical and geometrical ...

Improving resource utilization in carrier ethernet technologies

Caro Perez, Luis Fernando

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 ...

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

Solano Donado, Fernando

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 ...

Large-Scale Surface registration

Batlle Subirós, Elisabet

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 ...

Learning design implementation in context-aware and adaptive mobile learning

Gómez Ardila, Sergio Eduardo (Date of defense: 06-06-2013)

Mobile learning (m-learning) is still in its infancy, and great efforts should be made so as to investigate the potentials of an educational paradigm shift from the traditional one-size-fits-all teaching approaches to an ...

Manifold clustering for motion segmentation

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

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 ...

Medium access control messaging scheme for cognitive radio networks

Bolívar Díaz, Nicolás (Date of defense: 30-07-2012)

Cognitive Radio (CR) is one possible option for mitigating the inefficient wireless spectrum distribution that occurs as a result of fixed spectrum allocation. The use of Dynamic Spectrum Access capabilities will potentially ...

MSSPACC: Sistema d'execució paral·lela d'aplicacions amb especulació sobre entorns distribuïts

Puiggalí, Joan (Date of defense: 07-11-2012)

The research we have conducted has been aimed at developing a new mechanism of extraction and use of parallelism at a high level, based on speculation techniques, in cluster environments. This allows our mechanism to be ...

New robustness evaluation mechanism for complex networks

Manzano Castro, Marc (Date of defense: 20-11-2014)

Network science has significantly advanced in the last decade, providing insights into the underlying structure and dynamics of complex networks. Critical infrastructures such as telecommunication networks play a pivotal ...

One-shot pattern projection for dense and accurate 3D reconstruction in structured light

Fernández Navarro, Sergio (Date of defense: 22-06-2012)

This thesis focuses on the problem of 3D acquisition using coded structured light (CSL). In CSL, a projected pattern impinges artificial texture onto the object surface, increasing the number of correspondences in the ...

Online acoustic localization methods for autonomous underwater vehicles

Vallicrosa Massaguer, Guillem (Date of defense: 15-11-2018)

Autonomous Underwater Vehicles (AUVs) true autonomy capabilities in complex unknown environments, have not yet been fully achieved because of the lack of online algorithms that can solve fundamental problems such as ...

Online path planning for autonomous underwater vehicles under motion constraints

Hernández Vega, Juan David (Date of defense: 26-10-2017)

The most common applications of autonomous underwater vehicles (AUVs) include imaging and inspecting different kinds of structures on the sea. Most of these applications require a priori information of the area or structure ...

Path planning with homotopic constraints for autonomous underwater vehicles

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

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 ...

Robot learning applied to autonomous underwater vehicles for intervention tasks

Carrera Viñas, Arnau (Date of defense: 21-07-2017)

The interest in performing underwater tasks using Autonomous Underwater Vehicles (AUVs) has been growing over the past few years. In this thesis, a flexible framework for underwater interventions using a Learning ...

Robust image segmentation applied to magnetic resonance and ultrasound images of the prostate

Ghose, Soumya (Date of defense: 19-10-2012)

Prostate segmentation in trans rectal ultrasound (TRUS) and magnetic resonance images (MRI) facilitates volume estimation, multi-modal image registration, surgical planing and image guided prostate biopsies. The objective ...

Robustness against large-scale failures in communications networks

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

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 ...

Simultaneous detection and segmentation for generic objects

Torrent Palomeras, Albert (Date of defense: 08-07-2013)

This thesis deals with the simultaneous detection and segmentation for generic objects in images. The proposed approach is based on building a dictionary of patches, which defines the object and allows the extraction of ...

Simultaneous localization and mapping using single cluster probability hypothesis density filters

Lee, Chee Sing (Date of defense: 01-09-2015)

The majority of research in feature-based SLAM builds on the legacy of foundational work using the EKF, a single-object estimation technique. Because feature-based SLAM is an inherently multi-object problem, this has led ...

Sonar scan matching for simultaneous localization and mapping in confined underwater environments

Mallios, Angelos (Date of defense: 15-05-2014)

This thesis presents the development of a localization and mapping algorithm for an autonomous underwater vehicle (AUV). It is based on probabilistic scan matching of raw sonar scans within a pose-based simultaneous ...

Supporting competence development processes on open learning systems through personalization

Baldiris Navarro, Silvia Margarita (Date of defense: 14-12-2012)

This thesis aim for promoting the learning objects economy by offering teacher the possibility of generating adaptive and standardized learning designs. The adaptation of the generated learning design considers two of the ...

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