Now showing items 21-40 of 116

  • Classical methods of left ventricular contour extraction and preprocessing of echocardiographic images: a review 

    Torres Urgell, Lluís; Gasull Llampallas, Antoni; Marqués Acosta, Fernando (1989)
    Conference report
    Open Access
    A main objective of digital processing of echocardiographic images is to improve the signal to noise ratio of the video images acquired from the ultrasound equipment along with contour extraction in order to obtain cardiac ...
  • Class-weighted convolutional features for visual instance search 

    Jiménez, Albert; Alvarez, Jose M.; Giró Nieto, Xavier (2017)
    Conference lecture
    Open Access
    Image retrieval in realistic scenarios targets large dynamic datasets of unlabeled images. In these cases, training or fine-tuning a model every time new images are added to the database is neither efficient nor scalable. ...
  • Cleaning and measuring tools using digital image processing methods 

    Torres Xirau, Iban (Universitat Politècnica de Catalunya / Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik, 2013-07-31)
    Master thesis (pre-Bologna period)
    Open Access
    Covenantee:  Technische Universität Berlin
    [ANGLÈS] Many industrial machines use screws and other small tools to fix smaller components that compose the whole structure of the machine. To ensure that these tools withstand the pressures that can be subjected at, a ...
  • Click'n'Cut: crowdsourced interactive segmentation with object candidates 

    Carlier, Axel; Charvillat, Vincent; Salvador Aguilera, Amaia; Giró Nieto, Xavier; Marques, Ogé (ACM, 2014)
    Conference lecture
    Open Access
    This paper introduces Click’n’Cut, a novel web tool for inter- active object segmentation designed for crowdsourcing tasks. Click’n’Cut combines bounding boxes and clicks generated by workers to obtain accurate object ...
  • Comparative analyses of multi-frequency PSI ground deformation measurements 

    Sabater Cifuentes, José Raúl (Universitat Politècnica de Catalunya, 2012-03-29)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    [ANGLÈS] In recent years many new developments have been made in the field of SAR image analysis. The diversity of available SAR imagery allows a wider range of applications to be covered in the domain of risk management ...
  • Completion time minimization for distributed feature extraction in a visual sensor network testbed. 

    Serra Torrens, Jordi (Universitat Politècnica de Catalunya, 2014-11-24)
    Master thesis (pre-Bologna period)
    Open Access
    Covenantee:  Kungliga Tekniska högskolan
    [ANGLÈS] Real-time detection and extraction of visual features in wireless sensor networks is a challenging task due to its computational complexity and the limited processing power of the nodes. A promising approach is ...
  • Copyright protection platform 

    Pau Monné, Roger (Universitat Politècnica de Catalunya, 2012-01-24)
    Master thesis (pre-Bologna period)
    Open Access
    English: development of a multimedia platform that allows the users to obtain videos containing a mark introduced by a watermarking technique.
  • Crowdsourced object segmentation with a game 

    Salvador Aguilera, Amaia; Carlier, Axel; Giró Nieto, Xavier; Marques, Oge; Charvillat, Vincent (2013)
    Conference report
    Open Access
    We introduce a new algorithm for image segmentation based on crowdsourcing through a game : Ask'nSeek. The game provides information on the objects of an image, under the form of clicks that are either on the object, ...
  • Demonstration of an open source framework for qualitative evaluation of CBIR systems 

    Gomez Duran, Paula; Mohedano, Eva; McGuinness, Kevin; Giró Nieto, Xavier; O'Connor, Noel (Association for Computing Machinery (ACM), 2018)
    Conference lecture
    Open Access
    Evaluating image retrieval systems in a quantitative way, for example by computing measures like mean average precision, allows for objective comparisons with a ground-truth. However, in cases where ground-truth is not ...
  • Demo Reel d'efectes especials digitals 

    Klose Conde, Adrià (Universitat Politècnica de Catalunya, 2011)
    Master thesis (pre-Bologna period)
    Open Access
    El projecte es basa en la realització d'una Demo Reel d'efectes especials digitals. L'objectiu es crear una peça audiovisual que es pugui distribuir en un suport físic o via internet i que serveixi d'aparador o mostrari ...
  • Depth map compression via 3D region-based representation 

    Maceira, Marc; Morros Rubió, Josep Ramon; Ruiz Hidalgo, Javier (2016-07-21)
    Article
    Open Access
    In 3D video, view synthesis is used to create new virtual views between encoded camera views. Errors in the coding of the depth maps introduce geometry inconsistencies in synthesized views. In this paper, a new 3D ...
  • Descriptores de video de bajo nivel seleccionados 

    Mindan, Pere J.; Raventós, Arnau; Mur, Olga; Tarrés Ruiz, Francisco; Torres Urgell, Lluís (2011-09-30)
    External research report
    Restricted access - confidentiality agreement
    Entregable E 3.1.1
  • Detecció de prominència utilitzant el moviment de persones amb visió zenital 

    Caminal Colell, Ivan (Universitat Politècnica de Catalunya, 2017-06-29)
    Bachelor thesis
    Open Access
    La detecció de prominència d’un espai visual és una tasca que tradicionalment ha estat abordada mitjançant l’anàlisi de l’espai amb tècniques de processat d’imatge, aquestes tècniques es basen a estudiar característiques ...
  • Detecció i reconeixement de text mitjançant l'estimació de l'amplada del traç 

    Gimferrer Vilaplana, Anna (Universitat Politècnica de Catalunya, 2012-07-25)
    Master thesis (pre-Bologna period)
    Open Access
    [ANGLÈS] This report presents a method for detecting and recognizing text in television pictures, which is based on estimating the stroke width. The method extracts the text that is present in the image, and writes it in ...
  • Detecció i segmentació de text a través de l'estimació de l'ample de traç i BPT 

    Lladó Gargallo, Jordi (Universitat Politècnica de Catalunya, 2014-06-30)
    Bachelor thesis
    Open Access
    [Català]: Aquest projecte presenta un mètode de detecci ó i segmentació de text basat en l’estimació d’amplada de traç com a característica distintiva dels caràcters i una segmentació basada en el creixement de regions ...
  • Détection de texte dans des images vidéo: apprentissage de dictionnaires ou extraction de caractéristiques 

    Castillo Quer, Jordi (Universitat Politècnica de Catalunya / Institut National Polytechnique de Toulouse, 2013-09-10)
    Master thesis (pre-Bologna period)
    Open Access
    Covenantee:  Institut national polytechnique de Toulouse
    [AMGLÈS] This PFC describes two approaches for text detection in video images. The first one, unsuccessful, is based on dictionary learning with KSVD algorithm. A letter dictionary and a background dictionary are trained ...
  • Development and analysis of a NumPy-based DIC application for strain calculation 

    Zamora Agustí, Marc Guillem (Universitat Politècnica de Catalunya, 2018-06-21)
    Bachelor thesis
    Open Access
    Digital Image Correlation (DIC) is a full-field, non-contact optical technique that tracks 2-D or 3-D images in order to establish a one-to-one correspondence to obtain accurate deformation data. This technique is being ...
  • Digimatge, a Rich Internet Application for video retrieval from a Multimedia Asset Management system 

    Giró Nieto, Xavier; Salla, Ramon; Vives, Xavier (2010)
    Conference lecture
    Open Access
    This paper describes the integration of two new services aimed at assisting into the retrieval of video content from a Multimedia Asset Manager (MAM). The first tool suggest tags after an first textual query, and the ...
  • Diversity ranking for video retrieval from a broadcaster archive 

    Giró Nieto, Xavier; Alfaro Vendrell, Mónica; Marqués Acosta, Fernando (2011)
    Conference lecture
    Open Access
    Video retrieval through text queries is a very common practice in broadcaster archives. The query keywords are compared to the metadata labels that documentalists have previously associated to the video assets. This ...
  • Estudi de funcionalitats tàctils amb Kinect en superfícies no instrumentades 

    Andorrà Inglés, Magí (Universitat Politècnica de Catalunya, 2013-07-31)
    Master thesis (pre-Bologna period)
    Open Access
    [ANGLÈS] This project presents the study, design and implementation of a touch detection system over non-instrumented surfaces using a commercial depth sensor (MS Kinect). The main objective is the study of the tolerances ...