Browsing Portuguese Meeting on Computer Graphics 2011 - SIACG 2011 by Title

Now showing items 1-20 of 33

    • 3D Visualization of Sparse Geophysical Data Representing Uncertainty 

      Gonçalves, Vítor; Dias, Paulo; Almeida, Fernando; Madeira, Joaquim; Santos, Beatriz Sousa (The Eurographics Association, 2021)
      Geophysical data are sparse and by nature difficult to analyze. Usually domain experts use "mental models" to infer missing data according to the surrounding data and their own knowledge. The main goal of this work is to ...

    • 3DWikiU - 3D Wiki For Urban Environments 

      Melo, M.; Silva, P.; Magalhães, L.; Bessa, M.; Coelho, A.; Moura, J.; Rocha, A.; Ferreira, F.; Cruz, J.; Sousa, A. (The Eurographics Association, 2021)
      Virtual Reality (VR) systems may be used with great effectiveness in applications such as urban planning, virtual tourism, cultural heritage and education. In fact, the VR systems allow the visualization and interaction ...

    • Augmented Reality for Web - A New Interaction Method Without Markers 

      Silva, Luis F. A.; Silva, Frutuoso G. M. (The Eurographics Association, 2021)
      In the new age of omnipresent internet, browsers are accessible on every device in everyday's life. Thus it is also needed new interaction methods to facilitate the interaction through browser. Augmented reality is one of ...

    • BlenderCAVE: Easy VR Authoring for Multi-Screen Displays 

      Gascón, Jorge; Bayona, José M.; Espadero, José M.; Otaduy, Miguel A. (The Eurographics Association, 2021)
      BlenderCave is a framework for the fast creation of virtual reality applications for multi-screen display systems. It consists of a set of extensions to the open-source Blender Game Engine (BGE), leveraging the scene ...

    • Coded Apertures for Defocus Deblurring 

      Masia, Belen; Corrales, Adrian; Presa, Lara; Gutierrez, Diego (The Eurographics Association, 2021)
      The field of computational photography, and in particular the design and implementation of coded apertures, has yielded impressive results in the last years. Among their applications lies defocus deblurring, in which we ...

    • A Colour Rotation Based Detector for Bleeding Gastric Pathologies 

      Coelho, P.; Cunha, A.; Costa, P.; Hadjileontiadis, L. (The Eurographics Association, 2021)
      Colour is one the distinct features in computer vision systems and can be represented in several colour spaces. The most commonly used is the RGB colour space, since most high-quality cameras used in computer vision systems ...

    • Cortical 3D Face Recognition Framework 

      Rodrigues, J.; Lam, R.; Buf, J. du (The Eurographics Association, 2021)
      Empirical studies concerning face recognition suggest that faces may be stored in memory by a few canonical representations. In cortical area V1 exist double-opponent colour blobs, also simple, complex and end-stopped cells ...

    • Digital Cartographic Generalization in Spatial Databases: application issues in Power Grids CAD tools 

      Rodríguez, Javier Novo; Pereira, Elena Hernández; Canosa, Mariano Cabrero (The Eurographics Association, 2021)
      This work presents the results of applying several digital cartographic generalization techniques to improve the performance of an Electrical Power Grids Computer-Aided-Design application. The performance increase is ...

    • Efficient Propagation of Light Field Edits 

      Jarabo, Adrian; Masia, Belen; Gutierrez, Diego (The Eurographics Association, 2021)
      Light field editing is a complex task, due to the large amount of data and the need to keep consistency between views. This has hampered the creation of efficient edit propagation methods, similar to those existing for ...

    • GPU Collision Detection in Conformal Geometric Space 

      Roa, Eduardo; Theoktisto, Víctor; Fairén, Marta; Navazo, Isabel (The Eurographics Association, 2021)
      We derive a conformal algebra treatment unifying all types of collisions among points, vectors, areas (defined by bivectors and trivectors) and 3D solid objects (defined by trivectors and quadvectors), based in a reformulation ...

    • Graph-Based Reflectance Segmentation 

      Garces, Elena; Gutierrez, Diego; Lopez-Moreno, Jorge (The Eurographics Association, 2021)
      Most of the unsupervised image segmentation algorithms use just RGB color information in order to establish the similarity criteria between pixels in the image. This leads in many cases to a wrong interpretation of the ...

    • GraphJudge: A System for Assisted Assessment of Computer Graphics Assignments 

      Rocha, Lindomar; Rodrigues, Rui (The Eurographics Association, 2021)
      We describe a system for submission, automated validation and assisted evaluation of Computer Graphics' assignments. This type of assessments has a series of specific challenges associated to it, namely the analysis of ...

    • HaloDot: Visualization of the Relevance of Off-Screen Objects 

      Gonçalves, Tiago; Afonso, Ana Paula; Carmo, Maria Beatriz; Pombinho, Paulo (The Eurographics Association, 2021)
      The increasing usage of maps on mobile devices reinforce the need to solve some visualization and usability issues that constraint the user's interaction with information visualization applications. When exploring map ...

    • High-quality Compression of Mipmapped Textures 

      Andujar, C. (The Eurographics Association, 2021)
      High-quality texture minification techniques, including trilinear and anisotropic filtering, require texture data to be arranged into a collection of prefiltered texture maps called mipmaps. In this paper we present a ...

    • Inexpensive 3D Stereo for Two Users Using a Single Display 

      Re, Armando de la; Martorell, Eduardo; Camahort, Emilio; Abad, Francisco (The Eurographics Association, 2021)
      Multiuser computer systems allow several users to collaborate on the same task. Medium sized displays, like workbenches or tabletops provide a shared view of the task and a set of input devices to interface with the system. ...

    • Interacting with Outdoor Sports Performance Data 

      Lopes, J. M. Brisson (The Eurographics Association, 2021)
      This paper presents a portable application to visualize performance data obtained from GPS devices in outdoor sports (e.g., ski, running, BTT) that also record data as heartbeat rate. GPS file formats are analyzed and a ...

    • Interactive Elastic Deformation of 3D Images 

      Prados, Francisco J. R.; Salas, Alejandro León; Torres, Juan Carlos (The Eurographics Association, 2021)
      The standard workflow of a haptic device takes the position of the effector in space and sends a force vector in return. This paradigm naturally meets the behaviour shown in elastic materials, where the resistant force of ...

    • Interactive Visualizations of Automatic Debugging Reports 

      Riboira, André; Rodrigues, Rui; Abreu, Rui (The Eurographics Association, 2021)
      Automated debugging techniques, based on statistical analysis of historical test executions data, have recently received considerable attention due to their diagnostic capabilities. However, current automatic debugging ...

    • Investigating the Differences Between European Portuguese Sounds: An Approach Using Polygonal Mesh Comparison 

      Martins, Paula; Silva, Samuel; Oliveira, Catarina; Ferreira, Carlos; Silva, Augusto; Teixeira, António (The Eurographics Association, 2021)
      With the main purpose of studying the articulatory configuration of the European Portuguese (EP) sounds and to evaluate coarticulatory effects, a large 3D MRI database from several speakers and contexts have been acquired. ...

    • Left-Ventricle Global and Regional Functional Analysis from MDCT Images 

      Silva, Samuel; Santos, Beatriz Sousa; Madeira, Joaquim (The Eurographics Association, 2021)
      Left-ventricle functional analysis is of paramount importance for the assessment of coronary artery disease. Non-invasive coronary artery imaging using multiple-detector computed tomography (MDCT) provides a wealth of data ...