Now showing items 21-40 of 542

    • Controlling User Interface Objects through Pre- and Postconditions 

      Gieskens, Daniel F.; Foley, James D. (Georgia Institute of Technology, 1991)
      We have augmented user interface objects (i.e. windows, menus, buttons, sliders, etc.) with preconditions that determine their visibility and their enabled/disabled status and postconditions that are asserted when certain ...
    • Visualization in Science and Medicine 

      Ribarsky, William (Georgia Institute of Technology, 1991)
      After a very gradual 20 year development, the discipline of scientific visualization was given form and focus (and its name) by the seminal 1987 report, "Visualization in Scientific Computing". Since then the methods, ...
    • A Compositional View of User Interfaces - A Framework for Fully-Functional User Interface Design Tools 

      Kovacevic, Srdjan (Georgia Institute of Technology, 1991)
      A compositional view of user interfaces identifies common user interface component types and structuring principles for assembling components into a coherent interface. Both the components and the principles are reusable ...
    • Rotation algorithm artifacts in stereoscopic images 

      Hodges, Larry F.; McAllister, David F. (Georgia Institute of Technology, 1991)
      We examine the effect of using rotations for generation of the left- and right-eye perspective views of a stereoscopic image. We show that this approach to stereoscopic display of perspective views results in vertical ...
    • Radiosity Methods for Volume Rendering 

      Rushmeier, Holly E. (Georgia Institute of Technology, 1991)
      Radiosity methods are techniques for calculating radiative transfer. They were originally introduced in the field of heat transfer, and are descibed in many heat transfer textbooks (e.g. the undergraduate text by Incropera ...
    • Basic principles of stereographic software development 

      Hodges, Larry F. (Georgia Institute of Technology, 1991)
      Generation of images for a time-multiplexed stereoscopic display environment is not a straightforward extension of image generation in a perspective graphics environment. There are several factors that must be taken into ...
    • Medical Informatics Research at Georgia Tech : An Overview 

      Mullick, Rakesh; Ezquerra, Norberto F. (Georgia Institute of Technology, 1991)
      The overall objective of this paper is to describe ongoing research programs in the Medical Informatics Laboratory in the Bioengineering Center of the Georgia Institute of Technology. Current research projects are highly ...
    • User Interface Software Tools 

      Foley, James D. (Georgia Institute of Technology, 1991)
      Developing high-quality user interfaces is becoming the critical step in bringing many different computer applications to end users. Ease of learning and speed of use typically must be combined in an attractively-designed ...
    • Physically Accurate Synthetic Images for Computer Vision System Design 

      Rushmeier, Holly E.; Parker, Johne' Michelle; Lee, Kok-Meng (Georgia Institute of Technology, 1991)
      The design of a computer vision system for part presentation is a complex hardware/software problem. In the past, standard renderings of parts available from CAD systems have been used as aids in the design process. However, ...
    • Supporting Adaptive Interfaces in a Knowledge-based User Interface Environment 

      Sukaviriya, Piyawadee (Noi); Foley, James D. (Georgia Institute of Technology, 1992)
      Developing an adaptive interface requires a user interface that can be adapted, a user model, and an adaptation strategy. Research on adaptive interfaces in the past suffered from a lack of supporting tools which allow an ...
    • Stereoscopic Ray-Tracing 

      Adelson, Stephen Joel; Hodges, Larry F. (Georgia Institute of Technology, 1992)
      In this paper, we describe a method to create an approximate ray-traced stereoscopic pair by transforming a fully ray-traced left-eye view into an inferred right-eye view. Performance results from evaluating several random ...
    • On Handwriting Recognition System Performance: Some Experimental Results 

      Santos, Paulo J.; Baltzer, Amy J.; Badre, Albert; Henneman, Richard L.; Miller, Michael S. (Georgia Institute of Technology, 1992)
      Performance of a rule-based handwriting recognition system is considered. Performance limits of such systems are defined by the robustness of the character templates and the ability of the system to segment characters. ...
    • Anisotropies in Stereo Depth Thresholds of Spatial Patterns and the Stereo Aperture Problem 

      Davis, Elizabeth Thorpe; King, Robert A.; Guenter, Brian K.; Anoskey, Alana (Georgia Institute of Technology, 1992)
      Does a pattern's orientation affect stereoacuity? Do vertical disparities play a role in stereopsis? Furthermore, is retinal disparity encoded by changes in spatial position or spatial phase? The latter implies a "stereo ...
    • PERFEX: An Expert System for Interpreting 3D Myocardial Perfusion 

      Ezquerra, Norberto F.; Mullick, Rakesh; Cooke, C. David; Garcia, Ernest Victor; Krawczynska, Elizabeth (Georgia Institute of Technology, 1992)
      Interpreting three-dimensional (3D) data is generally recognized as an ill-defined and informationintensive task. The task becomes increasingly difficult in the context of medical diagnostic imagery, wherein the visual ...
    • A Second Generation User Interface Design Environment: The Model and the Runtime Architecture 

      Sukaviriya, Piyawadee (Noi); Foley, James D.; Griffith, Todd W. (Georgia Institute of Technology, 1992)
      Several obstacles exist in the user interface design process which distract a developer from designing a good user interface. One of the problems is the lack of an application model to keep the designer in perspective with ...
    • Preserving Arc Length in Texture Mapping 

      Guenter, Brian K.; Robertson, Scott Lee (Georgia Institute of Technology, 1992)
      Conventional mappings from the texture plane to three-dimensional surfaces fail to maintain the arc length of the texture when it is mapped onto the surface. This leads to unnatural texture appearance. In addition, texture ...
    • The Visualization of Parallel Systems: An Overview 

      Kraemer, Eileen T.; Stasko, John T. (Georgia Institute of Technology, 1992)
      We present an overview of visualization tools for parallel systems focusing on parallel debuggers, performance evaluation systems, and program visualization systems. Our goal in this paper is to summarize the issues addressed ...
    • A Methodology for Building Application-Specific Visualizations of Parallel Programs 

      Stasko, John T.; Kraemer, Eileen T. (Georgia Institute of Technology, 1992)
      Visualization of computer programs, particularly parallel programs, promises to help programmers better understand, develop, and debug their code, especially if the visualizations are relatively easy to create. We have ...
    • Geometric Simplification for Indirect Illumination Calculation 

      Rushmeier, Holly E.; Patterson, Charles W., Jr.; Veerasamy, Aravindan (Georgia Institute of Technology, 1992)
      We present a new method for accelerating global illumination calculations in the generation of physically accurate images of geometrically complex environments. In the new method, the environment geometry is simplified by ...
    • 3D Visualization of Pose Determination: Application to SPECT Imaging 

      Mullick, Rakesh; Ezquerra, Norberto F.; Garcia, Ernest Victor; Cooke, C. David; Folks, R. D. (Georgia Institute of Technology, 1992)
      Pose determination of 3D objects is a topic of active research, particularly in the area of medical imaging. The determination of the pose or orientation of a 3D object in a 3D dataset can be viewed as a two-fold problem: ...