Now showing items 1-7 of 7

    • A graph signal processing solution for defective directed graphs 

      Barrufet Ribes, Júlia (Universitat Politècnica de Catalunya, 2020-06-29)
      Bachelor thesis
      Open Access
      Covenantee:   USC Viterbi
      The main purpose of this thesis is to nd a method that allows to systematically adapt GSP techniques so they can be used on most non-diagonalizable graph operators. In Chapter 1 we begin by presenting the framework in ...
    • Analysis of twitter traffic based on renewal densities 

      Esteban Zarza, Ángel Javier (Universitat Politècnica de Catalunya, 2012-04-12)
      Master thesis (pre-Bologna period)
      Open Access
      Covenantee:   University of Southern California
      [ANGLÈS] We propose a novel approach for Twitter traffic analysis based on renewal theory. Even though Twitter datasets are of increasing interest to researchers, extracting information from message timing remains somewhat ...
    • Contributions to Distributed Spatial Compression in Wireless Sensor Networks 

      Pérez Trufero, Javier (Universitat Politècnica de Catalunya, 2010-07)
      Master thesis (pre-Bologna period)
      Open Access
      Covenantee:   University of Southern California
      This thesis presents several contributions in the field of distributed spatial compression inWireless Sensor Networks. First, since in most of the spatial compression schemes some nodes (raw nodes) need to broadcast their ...
    • Distributed graph signal processing 

      Sanou Gozalo, Eduard (Universitat Politècnica de Catalunya / University of Southern California, 2013-12-13)
      Bachelor thesis
      Open Access
      Covenantee:   University of Southern California
      [ANGLÈS] Graph representation of data is a current trend in research nowadays, especially for those problems dealing with huge amounts of information that need to be analyzed and studied. Many fields can benefit from the ...
    • Edge-preserving depth-map coding using graph-based wavelets 

      Sánchez Blanco, Alfonso (Universitat Politècnica de Catalunya, 2010-06)
      Master thesis (pre-Bologna period)
      Open Access
      This thesis presents a new wavelet transform speci cally designed for the coding of depth images which are used in view synthesis operations. Two basic properties of these images can be leveraged: rst, errors in pixels ...
    • Privacy preserving photo sharing analysis and derived compression technique for images 

      Bencomo Dixon, Eric (Universitat Politècnica de Catalunya / University of Southern California, 2013-12-19)
      Master thesis (pre-Bologna period)
      Open Access
      Covenantee:   University of Southern California
      [ANGLÈS] The initial idea for my thesis was to analyse the algorithm to: find possible ways to attack the privacy component, figure out ways to apply filtering to the privacy enabled images or reduce the overall size of ...
    • Protecting JPEG images using variable threshold splitting 

      Ballart Godoy, Pau (Universitat Politècnica de Catalunya, 2016-05-23)
      Bachelor thesis
      Open Access
      Covenantee:   University of Southern California
      This thesis describes an improvement of an existing algorithm for privacy preserving in image sharing (P3-Privacy Preserving Photo Sharing). In short, the existing algorithm uses a fixed threshold whereas in this thesis a ...