Now showing items 1-20 of 21

    • 3D pore analysis of sedimentary rocks 

      Vergés Garcia, Eduard; Tost Pardell, Daniela; Ayala Vallespí, M. Dolors; Ramos Guerrero, Emilio; Grau Carrión, Sergi (2010)
      External research report
      Open Access
      A 3D representation of the internal structure and fabric of sedimentary rocks is of paramount interest to evaluate their structural parameters such as porosity, pore-size distribution and permeability. The classical ...
    • 3D reconstruction and quantification of porous structures 

      Vergés Garcia, Eduard; Ayala Vallespí, M. Dolors; Grau Carrión, Sergi; Tost Pardell, Daniela (2008)
      Article
      Restricted access - publisher's policy
      In this paper, we describe the methodology that we have designed to quantify the pores distribution in bone implants and the empirical results that we have obtained with BioCAD designed scaffolds, microCT and confocal ...
    • An Adaptive Cutaway with Volume Context Preservation 

      Grau Carrión, Sergi; Puig Puig, Anna (Springer Berlin / Heidelberg, 2009-11-26)
      Part of book or chapter of book
      Restricted access - publisher's policy
      Knowledge expressiveness of scientific data is one of the most important visualization goals. However, current volume visualization systems require a lot of expertise from the final user. In this paper, we present a ...
    • Animation of 3D Avatars for Rehabilitation of the Upper Limbs 

      Moya, Sergio; Grau Carrión, Sergi; Tost Pardell, Daniela; Campeny, Ricard; Ruiz, Marcel (IEEE Computer Society Publications, 2011-07-29)
      Article
      Restricted access - publisher's policy
      The paper presents a 3D Virtual Environment (VE) for neurorehabilitation of the upper limb. Patients move one of their arms trying to simulate concrete daily actions, such as grasping a bottle, opening a door or putting ...
    • Assisted navigation for 3D serious games training 

      Moya Santos, Sergio; Grau Carrión, Sergi; Tost Pardell, Daniela (2013)
      Conference report
      Restricted access - publisher's policy
      Serious games in 3D virtual environments are becoming a popular tool for professional training activities as well as for rehabilitation. Navigation in 3D is recognized as one of the activity which is more dificult to master ...
    • Bio-CAD analysis of porosity bioimplants 

      Vergés Garcia, Eduard; Ayala Vallespí, M. Dolors; Grau Carrión, Sergi; Tost Pardell, Daniela (2008)
      Conference report
      Restricted access - publisher's policy
      In this work we present two methods to compute the porosity from a μCT image. One is the virtual simulation of a porosimeter and the other is a sphere-based heuristic approach. Both methods obtain a graph representing the ...
    • Efficient complementary viewpoint selection in volume rendering 

      Grau Carrión, Sergi; Puig Puig, Anna; Escalera, Sergio; Salamó, Maria; Amoros, Oscar (2013)
      Conference report
      Open Access
      A major goal of visualization is to appropriately express knowledge of scientific data. Generally, gathering visual information contained in the volume data often requires a lot of expertise from the final user to setup ...
    • First-person locomotion in 3D virtual environments: a usability analysis 

      Moya Santos, Sergio; Grau Carrión, Sergi; Tost Pardell, Daniela (2014)
      Article
      Open Access
      3D Virtual Environments (VE) are becoming popular as a tool for cognitive, functional and psychological assessment. Navigation in these environments is recognized as one of the most difficult activities in 3D Virtual ...
    • Frame-to-frame coherent GPU splatting 

      Grau Carrión, Sergi; Tost Pardell, Daniela (2008-07-26)
      Conference report
      Restricted access - confidentiality agreement
      Recently, several improvements of the classical splatting volume rendering technique have been proposed, specifically, GPU implementations that considerably speed it up. However, splatting time-varying data, even using ...
    • Frame-to-frame coherent image-aligned sheet-buffered splatting 

      Grau Carrión, Sergi; Tost Pardell, Daniela (2006-06)
      External research report
      Open Access
      Splatting is a classical volume rendering technique that has recently gained in popularity for the visualization of point-based suface models. Up to now, there has been few publications on its adaptation to time-varying ...
    • Hardware and software improvements of volume splatting 

      Vergés Garcia, Eduard; Grau Carrión, Sergi; Tost Pardell, Daniela (2006-05)
      External research report
      Open Access
      This paper proposes different hardware-based acceleration of the three classical splatting strategies: emph{composite-every-sample}, emph{object-space sheet-buffer} and emph{image-space sheet-buffer}.
    • Image-space sheet-buffered splatting on the GPU 

      Grau Carrión, Sergi; Tost Pardell, Daniela (2007-03)
      External research report
      Open Access
      Image-Space Sheet-Buffered Splatting is a popular high quality volume-rendering technique specially suitable for zoomed views of the data. On the contrary to other splatting approaches, it processes the voxels in slabs ...
    • Intelligent interactive volume classification 

      Grau Carrión, Sergi; Puig Puig, Anna; Escalera, Sergio; Salamó, Maria (2013)
      Conference report
      Restricted access - publisher's policy
      This paper defines an intelligent and interactive framework to classify multiple regions of interest from the original data on demand, without requiring any preprocessing or previous segmentation. The proposed intelligent ...
    • Interaction techniques in virtual environments 

      Moya Santos, Sergio; Grau Carrión, Sergi; Tost Pardell, Daniela (2013)
      External research report
      Open Access
      Virtual environments are used in very diverse applications: from leisure games to professional training and rehabilitation systems. In these applications, users interact with the elements of the environments through avatars ...
    • Region-based illustrative visualization of multimodal datasets 

      Abellán Moreno, Pascual; Tost Pardell, Daniela; Grau Carrión, Sergi; Puig Puig, Anna (2013-06-01)
      Article
      Restricted access - publisher's policy
      We present as novel method for the exploration of multiple overlapping volumes that provides flexibility to merge data in different ways in different regions. In each region, either one of the modalities is rendered alone ...
    • Serious games for screening pre-dementia conditions: from virtuality to reality? A pilot project 

      Zuchella, Chiara; Sinforiani, Elena; Tassorelli, Cristina; Cavallini, Elena; Tost Pardell, Daniela; Grau Carrión, Sergi; Pazzi, Stefania; Puricelli, Stefano; Bernini, Sara; Bottiroli, Sara; Vecchi, Tomaso; Sandrini, Giorgio; Nappi, Giuseppe (2014-11-02)
      Article
      Restricted access - publisher's policy
      Conventional cognitive assessment is based on a pencil-and-paper neuropsychological evaluation, which is time consuming, expensive and requires the involvement of several professionals. Information and communication ...
    • State-of-the-art: Frame-to-frame coherence in volume rendering 

      Grau Carrión, Sergi (2008-02)
      External research report
      Open Access
      In this report we review the state-of-the-art in frame-to-frame coherence in time-varying volume rendering.
    • The wise cursor: assisted selection in 3D serious games 

      Moya Santos, Sergio; Grau Carrión, Sergi; Tost Pardell, Daniela (Springer, 2013-06)
      Article
      Restricted access - publisher's policy
      In recent years, the evolution of 3D graphics hardware and software has lead to a growing interest for serious games in three-dimensional virtual environments for learning, training, and rehabilitation. Many of these ...
    • Time-varying volume visualization 

      Ayala Vallespí, M. Dolors; Campos Miralles, Jordi; Ferré, Maria; Grau Carrión, Sergi; Puig Puig, Anna; Tost Pardell, Daniela (2005-07-22)
      External research report
      Open Access
      Volume rendering is a very active research field in Computer Graphics because of its wide range of applications in various sciences, from medicine to flow mechanics. In this report, we survey a state-of-the-art on time-varying ...
    • Virtual Porosimeter 

      Vergés Garcia, Eduard; Ayala Vallespí, M. Dolors; Grau Carrión, Sergi; Tost Pardell, Daniela (2008)
      Article
      Restricted access - publisher's policy
      Recently, the term Bio-CAD has appeared to refer to the modeling of biological processes. This work focuses on the analysis of structural properties such as porosity of bioimplants for bone reconstruction. Specifically, ...