Proceedings Visualization '93

25-29 Oct. 1993

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  • Proceedings Visualization '93

    Publication Year: 1993
    Request permission for reuse | PDF file iconPDF (88 KB)
    Freely Available from IEEE
  • Fast volume rendering of compressed data

    Publication Year: 1993, Page(s):11 - 18
    Cited by:  Papers (26)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (714 KB)

    Volume rendering has been proposed as a useful tool for extracting information from large datasets, where non-visual analysis alone may not be feasible. The scale of these applications implies that data management is an important issue that needs to be addressed. Most volume rendering algorithms, however, process data in raw, uncompressed form. In previous work, we introduced a compressed volume f... View full abstract»

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  • Flow volumes for interactive vector field visualization

    Publication Year: 1993, Page(s):19 - 24
    Cited by:  Papers (37)  |  Patents (14)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (693 KB)

    Flow volumes are the volumetric equivalent of stream lines. They provide more information about the vector field being visualized than do stream lines or ribbons. Presented is an efficient method for producing flow volumes, composed of transparently rendered tetrahedra, for use in an interactive system. The problems of rendering, subdivision, sorting, composing artifacts, and user interaction are ... View full abstract»

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  • The vision camera: An interactive tool for volume data exploration and navigation

    Publication Year: 1993, Page(s):25 - 30
    Cited by:  Papers (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (573 KB)

    In this work we focus on one of the key problems of scientific visualization, the object recognition dilemma. The necessity to pre-interpret application data in order to classify object surface voxels prior to rendering has prevented many visualization methods from becoming practical. We propose the concept of vision by visualization which integrates computer vision methods into the visualization ... View full abstract»

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  • Visualization of time-dependent flow fields

    Publication Year: 1993, Page(s):32 - 38
    Cited by:  Papers (15)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    Presently, there are very few visualization systems available for time-dependent flow fields. Although existing visualization systems for instantaneous flow fields may be used to view time-dependent flow fields at discrete points in time, the time variable is usually not considered in the visualization technique. We present a simple and effective approach for visualizing time-dependent flow fields... View full abstract»

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  • A probe for local flow field visualization

    Publication Year: 1993, Page(s):39 - 45
    Cited by:  Papers (54)  |  Patents (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1048 KB)

    A probe for the interactive visualization of flow fields is presented. The probe can be used to visualize many characteristics of the flow in detail for a small region in the data set. The velocity and the local change of velocity (the velocity gradient tensor) are visualized by a set of geometric primitives. To this end, the velocity gradient tensor is transformed to a local coordinate frame, and... View full abstract»

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  • Visualization of turbulent flow with particles

    Publication Year: 1993, Page(s):46 - 52
    Cited by:  Papers (18)  |  Patents (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (629 KB)

    In this work a new method for visualization of three-dimensional turbulent flow using particle motion animation is presented. The method is based on Reynolds decomposition of a turbulent flow field into a convective and a turbulent motion. At each step of particle path generation a stochastic perturbation is added, resulting in random-walk motions of particles. A physical relation is established b... View full abstract»

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  • Optimal filter design for volume reconstruction and visualization

    Publication Year: 1993, Page(s):54 - 61
    Cited by:  Papers (22)  |  Patents (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1005 KB)

    Digital filtering is a crucial operation in volume reconstruction and visualization. Lowpass filters are needed for subsampling and minification. Interpolation filters are needed for registration and magnification, and to compensate for geometric distortions introduced by scanners. Interpolation filters are also needed in volume rendering for ray-casting and slicing. In this paper, we describe a m... View full abstract»

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  • Accelerating volume animation by space-leaping

    Publication Year: 1993, Page(s):62 - 69
    Cited by:  Papers (51)  |  Patents (11)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (823 KB)

    In this work we present a method for speeding the process of volume animation. It exploits coherency between consecutive images to shorten the path rays take through the volume. Rays are provided with the information needed to leap over the empty space and commence volume traversal at the vicinity of meaningful data. The algorithm starts by projecting the volume onto a C-buffer (coordinates-buffer... View full abstract»

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  • Rapid exploration of curvilinear grids using direct volume rendering

    Publication Year: 1993, Page(s):70 - 77
    Cited by:  Papers (17)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (853 KB)

    Fast techniques for direct volume rendering over curvilinear grids (common to computational fluid dynamics and finite element analysis) are developed. Three new projection methods that use polygon-rendering hardware for speed are presented and compared with each other and with previous methods for tetrahedral grids and rectilinear grids. A simplified algorithm for visibility ordering, based on a c... View full abstract»

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  • Volume sampled voxelization of geometric primitives

    Publication Year: 1993, Page(s):78 - 84
    Cited by:  Papers (36)  |  Patents (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (917 KB)

    We present a 3-D antialiasing algorithm for voxel-based geometric models. The technique band-limits the continuous object before sampling it at the desired 3-D raster resolution. By precomputing tables of filter values for different types and sizes of geometric objects, the algorithm is very efficient and has a complexity that is linear with the number of voxels generated. The algorithm not only c... View full abstract»

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  • Tioga: A database-oriented visualization tool

    Publication Year: 1993, Page(s):86 - 93
    Cited by:  Papers (7)  |  Patents (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (747 KB)

    In the work we present a new architecture for visualization systems that is based on data base management system (DBMS) technology. By building on the mechanisms present in a next-generation DBMS, rather than merely on the capabilities of a standard file manager, we show that a simpler and more powerful visualization system can be constructed. We retain the popular "boxes and arrows" programming n... View full abstract»

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  • Bridging the gap between visualization and data management: A simple visualization management system

    Publication Year: 1993, Page(s):94 - 101
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    A prototype visualization management system is described which merges the capabilities of a database management system with any number of existing visualization packages such as AVS or IDL. The prototype uses the Postgres database management system to store and access Earth science data through a simple graphical browser. Data located in the database is visualized by automatically invoking a desir... View full abstract»

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  • GRASPARC-A problem solving environment integrating computation and visualization

    Publication Year: 1993, Page(s):102 - 109
    Cited by:  Papers (31)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (750 KB)

    Visualization has proved an efficient tool in the understanding of large data sets in computational science and engineering. There is growing interest today in the development of problem solving environments which integrate both visualization and the computational process which generates the data. The GRASPARC project has looked at some of the issues involved in creating such an environment. An ar... View full abstract»

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  • An environment for telecollaborative data exploration

    Publication Year: 1993, Page(s):110 - 117
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (837 KB)

    This paper presents an environment for telecollaborative data exploration. It provides the following capabilities essential to data exploration: (1) users can probe the data, defining regions of interest with arbitrary shapes. (2) The selected data can be transformed and displayed in many different ways. (3) Linked cursors can be established between several windows showing data sets with arbitrary... View full abstract»

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  • HyperSlice

    Publication Year: 1993, Page(s):119 - 125
    Cited by:  Papers (53)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (777 KB)

    HyperSlice is a new method for the visualization of scalar functions of many variables. With this method the multi-dimensional function is presented in a simple and easy to understand way in which all dimensions are treated identically. The central concept is the representation of a multi-dimensional function as a matrix of orthogonal two-dimensional slices. These two-dimensional slices lend thems... View full abstract»

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  • Fine-grain visualization algorithms in dataflow environments

    Publication Year: 1993, Page(s):126 - 133
    Cited by:  Papers (10)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (652 KB)

    Most of the current dataflow visualization systems are based on coarse-grain dataflow computing models. In this paper we propose a fine-grain dataflow model that takes advantage of data locality properties of many visualization algorithms. A fine-grain module works on small chunks of data one at a time by keeping a dynamically adjusted moving window on the input data stream. It is more memory effi... View full abstract»

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  • Developing modular application builders to exploit MIMD parallel

    Publication Year: 1993, Page(s):134 - 141
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (718 KB)

    Modular application builders (MABs), such as AVS and Iris Explorer are increasingly being used in the visualization community. Such systems can already place compute intensive modules on supercomputers in order to utilize their power. This paper details two major projects at EPCC which attempted to fully integrate the MAB concept with a distributed memory MIMD (DM-MIMD) environment. The work prese... View full abstract»

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  • Virtual input devices for 3D systems

    Publication Year: 1993, Page(s):142 - 148
    Cited by:  Papers (9)  |  Patents (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (697 KB)

    The device unified interface is a generalized and easily expandable protocol for the communication between applications and input devices. The key idea is to unify various device data into the parameters of a so-called "virtual input device." The device information-base, which includes device dependent information, is also incorporated into the virtual input device. Using the device unified interf... View full abstract»

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  • InfoCrystal: A visual tool for information retrieval

    Publication Year: 1993, Page(s):150 - 157
    Cited by:  Papers (18)  |  Patents (26)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (755 KB)

    This paper introduces a novel representation, called the InfoCrystal, that can be used as a visualization tool as well as a visual query language to help users search for information. The InfoCrystal visualizes all the possible relationships among N concepts. Users can assign relevance weights to the concepts and use thresholding to select relationships of interest. The InfoCrystal allows users to... View full abstract»

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  • Visual feedback in querying large databases

    Publication Year: 1993, Page(s):158 - 165
    Cited by:  Papers (7)  |  Patents (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1350 KB)

    In this paper, we describe a database query system that provides visual relevance feedback in querying large databases. The goal of our system is to support the query specification process by using each pixel of the display to represent one data item of the database. By arranging and coloring the pixels according to their relevance for the query, the user gets a visual impression of the resulting ... View full abstract»

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  • DIVIDE: Distributed visual display of the execution of asynchronous, distributed algorithms on loosely-coupled parallel processors

    Publication Year: 1993, Page(s):166 - 173
    Cited by:  Patents (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (897 KB)

    The issue of monitoring the execution of asynchronous, distributed algorithms on loosely-coupled parallel processor systems, is important for the purposes of (i) detecting inconsistencies and flaws in the algorithm, (ii) obtaining important performance parameters for the algorithm, and (iii) developing a conceptual understanding of the algorithm's behavior, for given input stimulus, through visual... View full abstract»

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  • Performance visualization of parallel programs

    Publication Year: 1993, Page(s):174 - 181
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (938 KB)

    The user of a parallel computer system would like to know the performance of a program in terms of how optimally it uses the system resources. This task is increasingly performed by program performance visualization. The limitations of conventional performance data analysis techniques necessitate better visual analysis methods that are scalable with the problem and system sizes and extensible. The... View full abstract»

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  • Orientation maps: Techniques for visualizing rotations

    Publication Year: 1993, Page(s):183 - 188
    Cited by:  Papers (6)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    The set of possible orientations of a rigid three-dimensional object is a topological space with three degrees of freedom. This paper investigates the suitability of various techniques of visualizing this space. With a good technique the natural distance between orientations will be represented fairly accurately, and distortion to the "shape" of a collection of orientations induced by the change o... View full abstract»

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  • Geometric optimization

    Publication Year: 1993, Page(s):189 - 195
    Cited by:  Papers (40)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (647 KB)

    An algorithm is presented which describes an application independent method for reducing the number of polygonal primitives required to faithfully represent an object. Reducing polygon count without a corresponding reduction in object detail is important for: achieving interactive frame rates in scientific visualization, reducing mass storage requirements, and facilitating the transmission of larg... View full abstract»

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