Browsing by Author "Interrante, Victoria"

Now showing 1 - 5 of 5
  • Thumbnail Image
    Item
    Flow Visualization Using Natural Textures
    (2005-04-15) Urness, Timothy Matthew; Interrante, Victoria; Longmire, Ellen; Marusic, Ivan
    The use of natural textures provides a richly diverse set of possibilities for the visualization of flow data. In this paper, we present methods that utilize the qualities and attributes of natural textures to visualize multiple scalar distributions and multiple vector fields obtained across a 2D domain in a turbulent boundary layer flow. First, we illustrate how different attributes of textures can represent scalar quantities along streamlines. We then present a technique that allows for the perception of two separate vector fields within the same image by utilizing different textures. Finally, we illustrate how textures have the ability to indicate specific regions of interest within flow images.
  • Thumbnail Image
    Item
    Growing fitted textures
    (2001-02) Gorla, Gabriele; Interrante, Victoria; Sapiro, Guillermo
    In this paper, we address the problem of how to seamlessly and without repetition artifacts or visible projective distortion cover the surface of a polygonally-defined model with a texture pattern derived from an acquired 2D image such that the dominant orientation of the pattern will everywhere follow the surface shape in an aesthetically pleasing way. Specifically, we propose an efficient, automatic method for synthesizing, from a small sample swatch, patches of perceptually similar texture in which the pattern orientation may locally follow a specified vector field, such as the principal directions of curvature, at a per-pixel level, and in which the continuity of large and small scale features of the pattern is generally preserved across adjacent patches. We demonstrate the results of our method with a variety of texture swatches applied to standard graphics datasets.
  • Thumbnail Image
    Item
    Real-time Principal Direction Line Drawings of Arbitrary 3D Surfaces
    (1999-04-07) Girshick, Ahna; Interrante, Victoria
    In the field of computer-generated line drawings, line direction is among the most critical factors for conveying surface shape. Principal direction line drawings generated from volume data inspired us to target the widely-used polygonal surface representations. We use the principal directions of curvature to guide the lines over an arbitrarily curved 3D surface. The resulting line drawings are viewpoint independent and can be rendered in real-time.
  • Thumbnail Image
    Item
    Strategies for the Visualization of Multiple Co-located Vector Fields
    (2005-09-22) Urness, Timothy Matthew; Interrante, Victoria; Longmire, Ellen; Marusic, Ivan; O'Neill, Sean; Jones, Thomas W.
    Fluids research often involves developing theories about the complex relationships between multiple scalar and vector quantities. We discuss strategies for effectively visualizing co-located vector fields, enabling the key physical structures of one vector field to be clearly understood within the context of a related vector field. We describe the range of effects that can be obtained by combining several existing flow visualization techniques for the purposes of analyzing multiple vector fields. Results are shown through two distinctly different scientific applications: the visualization of velocity and vorticity fields in experimentally acquired turbulent boundary layer flow data, and the visualization of velocity and magnetic fields in computational simulations of astrophysical jets.
  • Thumbnail Image
    Item
    Using Virtual Reality Environments for Medical Devices Design
    (2009-10-07) Konchada, Vamsi; Coffey, Dane; Borazjani, Iman; Sotiropoulos, Fotis; Erdman, Arthur; Interrante, Victoria; Keefe, Daniel F.
    There is an urgent need for improved design methodologies and tools that give designers meaningful and accurate feedback early in the design process; virtual reality can be used to fill this need.  Virtual reality provides a highly engaging environment that allows user to experience and comprehend abstract concepts.  It can allow designers to broadly explore the space of potential design alternatives, and to expand the boundaries of complex designs that are possible given today's computer assisted tools.  Medical device researchers seek to better understand the complexities of cardiac anatomy, visualize how surrounding structures affect device function and deployment, and ultimately design more effective devices. Virtual representation combines visual graphics, virtual reality applications, finite element analysis based on the architecture of a 3D model. Introducing virtual reality based tools into the process of medical device design can significantly improve the process. We present our initial work aimed at developing new immersive visualization and interactive design tools for improving the medical device design process. Our initial work focuses on developing 3-dimensional visualizations of simulated blood flow through mechanical heart valves. Our goal is to develop 3D user interfaces for refining medical device designs within the context of patient-specific anatomy and simulated flow data.