Portuguese Meeting on Computer Graphics 2011 - SIACG 2011: Recent submissions

Now showing items 1-20 of 33

    • 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 ...

    • 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 ...

    • 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. ...

    • Robust Method for Estimating Normals on Point Clouds Using Adaptive Neighborhood Size 

      Leal, E.A.; Leal, N.E. (The Eurographics Association, 2021)
      Normal estimation on sampled curves or surfaces is a basic step of many algorithms in computer graphics, computer vision, and especially in recognition and reconstruction of three dimensional objects. This paper presents ...

    • 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 ...

    • A Moving Least Squares Method for Implant Model Deformation in Computer Aided Orthopedic Surgery for Fractures of Lower Extremities 

      Ramírez, Esmitt; Coto, Ernesto (The Eurographics Association, 2021)
      Preoperative planning is an essential step before performing any surgical procedure. Computer Aided Orthopedic Surgery (CAOS) systems are extensively used for the planning of surgeries for fractures of lower extremities. ...

    • Linear-Time Dynamics of Characters with Stiff Joints 

      Hernández, Fernando; Garre, Carlos; Casillas, Rubén; Otaduy, Miguel A. (The Eurographics Association, 2021)
      Characters, like other articulated objects and structures, are typically simulated using articulated dynamics algorithms. There are efficient linear-time algorithms for the simulation of open-chain articulated bodies, but ...

    • 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 ...

    • 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 ...

    • Volume-Surface Collision Detection 

      Ortegano, J.; Navarro, H.; Carmona, R. (The Eurographics Association, 2021)
      The presence or not of collisions between objects is usually required to study the interaction between them, increasing the realism in virtual environments. Collision detection between polygonal objects has been widely ...

    • Real-Time Modelling and Rendering of Sprayed Concrete 

      Vélez, G.; Matey, L.; Amundarain, A.; Ordás, F.; Marín, J.A. (The Eurographics Association, 2021)
      This paper presents a new real-time method to model and render how sprayed concrete is spread on a surface. The method not only models and renders deposits sprayed from any angle, any distance and with any concrete flow, ...

    • Procedural Modelling of Destructible Materials 

      Gestel, J. van; Bidarra, R. (The Eurographics Association, 2021)
      Traditional content creation for computer games is a costly process. In particular, current techniques for authoring destructible behaviour are often limited to a single object basis. In this paper, we build on previous ...

    • 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 ...

    • Parallel Collision Detection Oriented to Distributed Memory Architectures for High-Resolution Meshes 

      Novalbos, Marcos; Sánchez, Alberto (The Eurographics Association, 2021)
      Higher resolution meshes should be used in graphics applications to make them as realistic as they can. However, they imply a high computational. Several approaches have been built to solve collision detection, although ...

    • 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 ...

    • A Simple Surface Tracking Method for Physically-Based 3D Water Simulations 

      Amador, G.; Gomes, A. (The Eurographics Association, 2021)
      Water simulation, and more generically fluid simulation, is an important research topic in computer graphics. In 3D Eulerian Navier-Stokes-based water simulations, surface tracking and rendering are two delicate problems. ...

    • 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. ...

    • Procedural Modeling of Suspension Bridges 

      Patow, Gustavo (The Eurographics Association, 2021)
      In this paper we introduce a method for designing a class of engineering structures, namely suspension bridges. These bridges are ubiquitous in the industrialized countries, often appearing in known city landscapes, yet ...

    • Mobile Computational Photography: Exposure Fusion on the Nokia N900 

      Echevarria, Jose I.; Gutierrez, Diego (The Eurographics Association, 2021)
      This paper explores the Nokia N900 platform as a versatile playground for mobile computational photography. We present the implementation of a simple yet practical application to acquire high quality tone mapped HDR images, ...

    • 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 ...