http://hdl.handle.net/2117/3928 2013-05-24T09:39:15Z http://hdl.handle.net/2117/19316 Title: Region-based filtering of images and video sequences: a morphological viewpoint Authors: Salembier Clairon, Philippe Jean 2013-05-16T14:39:40Z http://hdl.handle.net/2117/19216 Title: Laboratori docent d'ones de radiació i ones guiades Authors: Cardama Aznar, Ángel; Mallorquí Franquet, Jordi Joan; Romeu Robert, Jordi; Torres Torres, Francisco 2013-05-14T16:46:47Z http://hdl.handle.net/2117/19215 Title: Filter bank transceiver design for ultra wideband Authors: Ibars, C.; Navarro, Mònica; Fernandez Prades, Carles; Artiga, Xavier; Moragrega, Ana; George-Gavrincea, Ciprian; Mollfulleda, Antonio; Nájar Martón, Montserrat 2013-05-14T16:37:30Z http://hdl.handle.net/2117/19213 Title: Fundamental limits in the accuracy of wireless positioning Authors: Bacci, Giacomo; Closas Gómez, Pau; D'Amico, Antonio; Dardari, Davide; Fernandez Prades, Carles; Fontanella, Diana; Gezici, Sinan; Luise, Marco; Mallat, Achraf; Mengali, Umberto; Nájar Martón, Montserrat; Nicoli, Monica; Oestges, Claude; Vandendorpe, Luc 2013-05-14T16:16:41Z http://hdl.handle.net/2117/18708 Title: Les tecnologies de la parla: lloc de trobada, difícil però necessària, entre lingüística i tecnologia Authors: Nadeu Camprubí, Climent Abstract: La recerca i el desenvolupament d'aplicacions en tecnologies de la parla han deixat força de banda els coneixements lingüístics. Les raons són diverses, com veurem, però la dificultat del treball conjunt de lingüistes i tecnòlegs no significa que aquest no sigui necessari per arribar més lluny en els objectius de la pròpia tecnologia. 2013-04-08T14:39:43Z http://hdl.handle.net/2117/18575 Title: Telecomunicacions Authors: Berenguer Sau, Jordi 2013-04-03T13:49:20Z http://hdl.handle.net/2117/18450 Title: Foreground objects segmentation for moving camera scenarios based on SCGMM Authors: Gallego, Jaime; Pardàs Feliu, Montse; Solano, Montse Abstract: In this paper we present a new system for segmenting non-rigid objects in moving camera sequences for indoor and outdoor sce narios that achieves a correct object segmentation via global MAP-MRF framework formulation for the foreground and background classification task. Our proposal, suitable for video indexation applications, receives as an input an initial segmentation of the object to segment and it consists of two region-based parametric probabilistic models to model the spatial (x,y) and color (r,g,b) domains of the foreground and background classes. Both classes rival each other in modeling the regions that appear within a dynamic region of interest that includes the foreground object to segment and also, the background regions that surrounds the object. The results presented in the paper show the correctness of the object segmentation, reducing false positive and false negative detections originated by the new background regions that appear near the region of the object 2013-03-21T10:45:10Z http://hdl.handle.net/2117/18323 Title: Wireless optical communications through the turbulent atmosphere: a review Authors: Barrios Porras, Ricardo Alfonso; Dios Otín, Víctor Federico 2013-03-14T19:35:57Z http://hdl.handle.net/2117/18282 Title: Telecomunicacions Authors: Berenguer Sau, Jordi 2013-03-13T16:56:36Z http://hdl.handle.net/2117/18180 Title: Innovative signal processing techniques for wireless positioning Authors: Dardari, Davide; Di Dio, Mario; Emmanuele, Andrea; Fontanella, Diana; Gezici, Sinan; Gholami, Mohammad Reza; Kieffer, Michel; Lagunas Targarona, Eva; Louveaux, Jérôme; Mallat, Achraf; Nájar Martón, Montserrat; Navarro, Monica; Nicoli, Monica; Reggiani, Luca; Rydström, Mats; Ström, Erik G.; Vandendorpe, Luc; Zanier, Francesca 2013-03-11T16:06:00Z http://hdl.handle.net/2117/17773 Title: MATLAB as a design and verification tool for the hardware prototyping of wireless communication systems Authors: Font Bach, Oriol; Pascual Iserte, Antonio; Bartzoudis, Nikolaos; López Bueno, David 2013-02-14T15:54:47Z http://hdl.handle.net/2117/17664 Title: Region-based caption text extraction Authors: León Cristóbal, Míriam; Vilaplana Besler, Verónica; Gasull Llampallas, Antoni; Marqués Acosta, Fernando Abstract: This chapter presents a method for caption text detection. The proposed method will be included in a generic indexing system dealing with other semantic concepts which are to be automatically detected as well. To have a coherent detection system, the various object detection algorithms use a common image description, a hierarchical region-based image model. The proposed method takes advantage of texture and geometric features to detect the caption text. Texture features are estimated using wavelet analysis and mainly applied for text candidate spotting. In turn, text characteristics verification relies on geometric features,which are estimated exploiting the region-based image model. Analysis of the region hierarchy provides the final caption text objects. The final step of consistency analysis for output is performed by a binarization algorithm that robustly estimates the thresholds on the caption text area of support 2013-02-12T14:11:11Z http://hdl.handle.net/2117/17344 Title: Signal processing for hybridization Authors: Caceres Duran, Mauricio A.; Closas Gómez, Pau; Falletti, Emanuela; Fernández Prades, Carlos; Nájar Martón, Montserrat; Sottile, Francesco Abstract: This chapter presents several signal processing strategies to combine together, in a seamless estimation process, position-related measurements coming from different technologies and/or systems (e.g., TOA and TDOA measurements in terrestrial networks, TOA and RSS measurements, or even satellite and terrestrial systems, or satellite and inertial navigation systems). This approach, generally indicated as “hybridization”, promises to provide better accuracy with respect to its stand-alone counterparts, or better availability thanks to the diversity of the employed technologies. For example, hybridization between satellite and inertial systems is expected to compensate for the respective fragilities of the two systems, namely the relatively high error variance of the former and the drift of the latter. The mathematical framework where hybridization is developed is Bayesian filtering: the generic structure is reviewed and the well-known Kalman filter and its variants are inserted in the framework, with examples of applications to positioning problems. Then the particle filter approach is explained, with its most used variants. Examples of hybrid localization algorithms are then shown, starting from a hybrid terrestrial architecture, then passing to the architectures that blend GNSS and inertial measurements, using either the Kalman filter approach or the direct position estimation approach. Finally, an example of hybrid localization based on GNSS and peer-to-peer terrestrial signaling is presented. 2013-01-14T14:24:47Z http://hdl.handle.net/2117/17335 Title: Casting signal processing to reall-world data Authors: Closas Gómez, Pau; Conti, Andrea; Dardari, Davide; Decarli, Nicoló; Falletti, Emanuela; Fernández Prades, Carlos; Gholami, Mohammad Reza; Nájar Martón, Montserrat; Lagunas Targarona, Eva; Pini, Marco; Rydström, Mats; Sottile, Francesco; Ström, Erik G. Abstract: This chapter presents the results of a testing and validation activity carried out to analyze the performance of signal-processing techniques related to positioning and navigation. The steps included the setup of a measurement campaign and the setup of a shared database, the usage of this database to test algorithms, and the development of a software defined radio (SDR)-based architecture for a GNSS receiver, to be used for advanced laboratory tests on innovative GNSS-related signal processing algorithms. During the measurement campaign, a total of 22 ZigBee-based devices, model CC2430 made by Texas Instruments, were used to measure RSS values. Each of them is a single chip solution which integrates microprocessor and radio interface compliant with the IEEE 802.15.4 standard at 2.4 GHz. Two UWB-based devices, model PulsOn220 made by Time Domain, were used to perform TOA ranging measurements in both static and dynamic scenarios. During the test, the receiver in light-indoor condition could autonomously track only one satellite, identified as PRN 9. This PRN was also tracked by the aiding user; therefore, it was used to estimate the clock offset among the two PCs. 2013-01-14T13:03:30Z http://hdl.handle.net/2117/16789 Title: Rich internet application for semi-automatic annotation of semantic shots on keyframes Authors: Carcel, Elisabet; Martos, Manuel; Giró Nieto, Xavier; Marqués Acosta, Fernando Abstract: This paper describes a system developed for the semiautomatic annotation of keyframes in a broadcasting company. The tool aims at assisting archivists who traditionally label every keyframe manually by suggesting them an automatic annotation that they can intuitively edit and validate. The system is valid for any domain as it uses generic MPEG-7 visual descriptors and binary SVM classifiers. The classification engine has been tested on the multiclass problem of semantic shot detection, a type of metadata used in the company to index new content ingested in the system. The detection performance has been tested in two different domains: soccer and parliament. The core engine is accessed by a Rich Internet Application via a web service. The graphical user interface allows the edition of the suggested labels with an intuitive drag and drop mechanism between rows of thumbnails, each row representing a different semantic shot class. The system has been described as complete and easy to use by the professional archivists at the company 2012-10-24T10:38:15Z