Search Results

Now showing 1 - 6 of 6
  • Item
    From the Patient to the Surgery - A Complete Computer Vision and Graphics Process
    (The Eurographics Association, 2012) Martinez, A.; Jimenez, J.; Isabel Navazo and Gustavo Patow
    Generating digital information ready to use on a surgery operation from a patient is a complex process. This process involves computer vision techniques, in order to extract digital information from medical images, and computer graphics techniques in order to generate proper models to interact with the digital information. In this approach a set of techniques covering both fields (computer vision and graphics) have been used to develop a complete process from the medical image to the surgery training.
  • Item
    Uncertainty Visualization of Brain Fibers
    (The Eurographics Association, 2012) Hermosilla, Pedro; Brecheisen, Ralph; Vázquez, Pere-Pau; Vilanova, Anna; Isabel Navazo and Gustavo Patow
    Diffuse Tensor Imaging (DTI) is an acquisition method based on Magnetic Resonance (MR) that provides information on the white matter fiber pathways in the living human brain. Such knowledge is crucial for understanding the way different parts of the brain work and how they interact with each other. The reconstruction of fiber tracts, however, depends on a number of parameters that introduce a degree of uncertainty in the data. Together with the parameter setting, other elements such as noise, motion, partial volume effects, or image artifacts increase the uncertainty. Therefore, fiber tracking algorithms may produce misleading results. Visualizing such uncertainty is important to avoid taking wrong decisions in medical environments. In this paper we present a set of techniques that provide a better understanding on the visualization of brain fibers by means of textures, silhouettes, ambient occlusion, and animation.
  • Item
    Locating Companies in 3D Urban Environments on the Internet
    (The Eurographics Association, 2012) Estrella, Ana M. López; Ortega, M. Dolores Robles; Alvarado, Lidia Ortega; Higueruela, Francisco R. Feito; Isabel Navazo and Gustavo Patow
    3D visualization is being incorporated in a lot of fields, including Geographic Information Systems (GIS). In addition, the Internet is the most popular method to find information, due to its accessibility. For this reason, most companies and businesses are interested in showing their products on the Web to make them well-known to many people. Considering all these concepts, this paper explains the process of developing a web application prototype with some GIS features. The main goal is to obtain business information, the location and the 2.5D navigation in an urban environment. In this way, through a web browser, the user will be able to search for companies by category, get information and see the scene from different levels of detail.
  • Item
    Management of 3D Geometry on Portable Devices
    (The Eurographics Association, 2012) Martínez, José Olmos; Romero, Francisco Ramos; Gonzalez, Carlos; Isabel Navazo and Gustavo Patow
    The mobile devices has evolutioned quickly in the recent years. The Games industry realized the great potential of these devices and made many developments whose requirements makes devices reach their hardware limits so there is a need to improve performance. One way is to study different forms for efficient 3D models visualizations.
  • Item
    Interactive Generation of (Paleontological) Scientific Illustrations from 3D-models
    (The Eurographics Association, 2012) Schäfer, Sebastian; Knopp, Christoph; Krömker, Detlef; Isabel Navazo and Gustavo Patow
    Scientific illustrations play an important role in the paleontological domain and are complex illustrations that are manually drawn. The artist creates illustrations that feature common expressive painting techniques: outlines, both irregular and periodic stippling as well as an abstract shaded surface in the background. We present a semiautomatic tool to generate these illustrations from 3D-models in real-time. It is based on an extensible GPU-based pipeline to interactively render characteristic into image-layers that are combined in an image-editing fashion. The user can choose the techniques used to render each layer and manipulate its key aspects. Using 3D- and 2D-painting the artist can still interact with the result and adjust it to his or her liking.
  • Item
    WebGL-based Visualization of Voxelized Brain Models
    (The Eurographics Association, 2012) Torre, J. Cruz de la; Ibáñez, J. Jiménez; Estrella, A. M. López; Miras, J. Ruiz de; Isabel Navazo and Gustavo Patow
    This work presents our preliminary results on the interactive construction and visualization of voxelized brain models into Web platforms by using WebGL. Our voxel model is a non-usual level of detail (LOD) representation based on the box-counting algorithm used to calculate the fractal dimension of 3D brain images. Our results to date show a promising solution based on a client-server approach.