Now showing items 21-40 of 87

    • Bandwidth reduction techniques for remote navigation systems 

      Vázquez Alcocer, Pere Pau; Sbert Cassasayas, Mateu (2002)
      Conference report
      Restricted access - publisher's policy
      In this paper we explore a set of techniques to reduce the bandwidth in remote navigation systems. These systems, such as exploration of virtual 3D worlds or remote surgery, usually require higher bandwidth than the common ...
    • Colonic content assessment from MRI imaging using a semi-automatic approach 

      Ceballos Inza, Víctor; Monclús Lahoya, Eva; Vázquez Alcocer, Pere Pau; Bendezú García, Álvaro; Mego Silva, Marianela; Merino Casabiel, Xavier; Azpiroz Vidaur, Fernando; Navazo Álvaro, Isabel (European Association for Computer Graphics (Eurographics), 2019)
      Conference report
      Open Access
      The analysis of the morphology and content of the gut is necessary in order to achieve a better understanding of its metabolic and functional activity. Magnetic resonance imaging (MRI) has become an important imaging ...
    • Correlating text and images: concept and evaluation 

      Götzelmann, Timo; Vázquez Alcocer, Pere Pau; Hartmann, Knut; Nürnberger, Andreas; Strothotte, Thomas (2007)
      Conference report
      Restricted access - publisher's policy
      This paper presents the concept and an evaluation of a novel approach to support students to understand complex spatial relations and to learn unknown terms of a domain-specific terminology with coordinated textual ...
    • Cost-effective feature enhancement for volume datasets 

      Díaz Iriberri, José; Marco Gómez, Jordi; Vázquez Alcocer, Pere Pau (2010)
      Conference report
      Restricted access - publisher's policy
      Volume models often show high complexity. Local details and overall shape may sometimes be difficult to perceive. Unsharp masking techniques improve the perception of those small features by increasing the local contrast. ...
    • Data-aware picking for medical models 

      Monclús Lahoya, Eva; Vázquez Alcocer, Pere Pau; Navazo Álvaro, Isabel (Springer, 2014)
      Part of book or chapter of book
      Open Access
      Medical doctors are often faced with the problem of selecting anchoring points in 3D space. These points are commonly used for measurement tasks, such as lengths of bones, or dimensions of pathological structures (e. g. ...
    • Data-aware picking for medical models 

      Monclús Lahoya, Eva; Vázquez Alcocer, Pere Pau; Navazo Álvaro, Isabel (Springer, 2014-09-30)
      Part of book or chapter of book
      Open Access
      Medical doctors are often faced with the problem of selecting anchoring points in 3D space. These points are commonly used for measurement tasks, such as lengths of bones, or dimensions of pathological structures (e.g. ...
    • Depth-enhanced maximum intensity projection 

      Díaz Iriberri, José; Vázquez Alcocer, Pere Pau (2010)
      Conference report
      Open Access
      The two most common methods for the visualization of volumetric data are Direct Volume Rendering (DVR) and Maximum Intensity Projection (MIP). Direct Volume Rendering is superior to MIP in providing a larger amount of ...
    • Development of general-purpose projection-based augmented reality systems 

      Sunet Pérez, Marc; Comino Trinidad, Marc; Karatzas, Dimosthenis; Chica Calaf, Antonio; Vázquez Alcocer, Pere Pau (2016-12-20)
      Article
      Restricted access - publisher's policy
      Despite the large amount of methods and applications of augmented reality, there is little homogenizatio n on the software platforms that support them. An exception may be the low level control software that is provided ...
    • Downsampling and storage of pre-computed gradients for volume rendering 

      Díaz García, Jesús; Brunet Crosa, Pere; Navazo Álvaro, Isabel; Vázquez Alcocer, Pere Pau (European Association for Computer Graphics (Eurographics), 2017)
      Conference report
      Open Access
      The way in which gradients are computed in volume datasets influences both the quality of the shading and the performance obtained in rendering algorithms. In particular, the visualization of coarse datasets in multi-resolution ...
    • Downsampling methods for medical datasets 

      Díaz García, Jesús; Brunet Crosa, Pere; Navazo Álvaro, Isabel; Vázquez Alcocer, Pere Pau (IADIS Press, 2017)
      Conference report
      Open Access
      Volume visualization software usually has to deal with datasets that are larger than the GPUs may hold. This is especially true in one of the most popular application scenarios: medical visualization. Typically, medical ...
    • Enhanced magnification for reduced movement in virtual reality environments 

      Monclús Lahoya, Eva; Navazo Álvaro, Isabel; Vázquez Alcocer, Pere Pau (IADIS Press, 2016)
      Conference report
      Restricted access - publisher's policy
      Although Virtual Reality (VR) environments have seen slower adoption rates than expected among the medical community, throughout the last years, several new techniques and devices (e.g. Oculus Rift) have been developed ...
    • Fast adaptive selection of best views 

      Vázquez Alcocer, Pere Pau; Sbert Cassasayas, Mateu (2003)
      Conference report
      Restricted access - publisher's policy
      Automatic computation of best views of objects is very useful. For example, they can be used as the starting point of a scene exploration, or to enrich galleries of objects available through Internet by adding an image a ...
    • Feature-preserving downsampling for medical images 

      Díaz García, Jesús; Brunet Crosa, Pere; Navazo Álvaro, Isabel; Pérez, Frederic; Vázquez Alcocer, Pere Pau (European Association for Computer Graphics (Eurographics), 2015)
      Conference lecture
      Open Access
      In the medical imaging field, interactive direct volume rendering of large volume datasets is a challenging task. Multi-resolution techniques deal with this problem by downsampling the original dataset to produce coarser ...
    • Fonaments d'informàtica : pràctiques de laboratori 

      Marco Gómez, Jordi; Xhafa Xhafa, Fatos; Vázquez Alcocer, Pere Pau (Edicions UPC, 2006)
      Book
      Restricted access to the UPC academic community
      Els materials d'aquest llibre cobreixen les sessions de laboratori de l'assignatura Fonaments d'Informàtica de les titulacions de les enginyeries industrials. L'objectiu primordial ha estat obtenir, de manera autocontinguda, ...
    • Full high-dynamic range images for dynamic scenes 

      Ramírez Orozco, Raissel; Martín, Ignacio; Loscos, Céline; Vázquez Alcocer, Pere Pau (2012)
      Conference report
      Open Access
      The limited dynamic range of digital images can be extended by composing photographs of the same scene taken with the same camera at the same view point at di erent exposure times. This is a standard procedure for static ...
    • High quality illustrative effects for molecular rendering 

      Hermosilla Casajús, Pedro; Guallar, Víctor; Vinacua Pla, Álvaro; Vázquez Alcocer, Pere Pau (2016-02)
      Article
      Restricted access - publisher's policy
      All-atom simulations are crucial in biotechnology. In Pharmacology, for example, molecular knowledge of protein-drug interactions is essential in the understanding of certain pathologies and in the development of improved ...
    • Human-document interaction systems: a new frontier for document image analysis 

      Karatzas, Dimosthenis; Poulain d'Andecy, Vincent; Rusiñol, Marçal; Chica Calaf, Antonio; Vázquez Alcocer, Pere Pau (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Open Access
      All indications show that paper documents will not cede in favour of their digital counterparts, but will instead be used increasingly in conjunction with digital information. An open challenge is how to seamlessly link ...
    • Image-based modeling using viewpoint entropy 

      Vázquez Alcocer, Pere Pau; Feixas, Miquel; Sbert Cassasayas, Mateu; Heidrich, Wolfgang (2002)
      Conference report
      Open Access
      We present a new method to automatically determine the correct camera placement positions in order to obtain a minimal set of views for Image-Based Rendering. The viewpoints should cover all visible polygons with an adequate ...
    • Improving perception accuracy in bar charts with internal contrast and framing enhancements 

      Díaz Iriberri, José; Meruvia Pastor, Oscar; Vázquez Alcocer, Pere Pau (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Open Access
      Bar charts are among the most commonly used visualization graphs. Their main goal is to communicate quantities that can be visually compared. Since they are easy to produce and interpret, they are found in any situation ...
    • Improving perception of molecular surface visualizations by incorporating translucency effects 

      Hermosilla Casajús, Pedro; Maisch, Sebastian; Vázquez Alcocer, Pere Pau; Ropinski, Timo (European Association for Computer Graphics (Eurographics), 2018)
      Conference report
      Open Access
      Molecular surfaces are a commonly used representation in the analysis of molecular structures as they provide a compact description of the space occupied by a molecule and its accessibility. However, due to the high ...