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检索条件"任意字段=Conference on Visual Data Exploration and Analysis IV"

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visual debugging of data and operations for concurrent programs

Visual debugging of data and operations for concurrent progr...

引用

conference on visual data exploration and analysis iv

作者： Erbacher, RF Univ. of Massachusetts/Lowell (United States)

ISBN: (纸本)0819424285

Symmetric multiprocessor systems (SMPs) are the desktop systems of the future. As they become more widely used, application developers will need to make better use of them. Merely providing threading will be insufficient. Companies will need to provide applications that parallelize portions of code and use the processors in SMPs To their full extent. This will have a much more dramatic effect on improving performance. Before this can be achieved however, tools must be developed which aid programmers, who may have little or no experience in programming parallel systems, to debug and performance tune their applications. Our goal is to improve the technology available through interactive computational steering and to develop techniques that will be valuable for all types of concurrent systems not just SMPs. This will be done through integrated operation visualization, data highlighting, interactive computational steering, and by concentrating an the data in a parallel system rather than on the processors or code.

关键词： visualization interactive computational steering program visualization concurrent systems

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Interactive visual exploration for knowledge discovery on the Web

Interactive visual exploration for knowledge discovery on th...

引用

1997 IEEE conference on Information visualization (iv 97)

作者： Oxman, R Israel Inst of Technology Haifa Israel

ISBN: (纸本)0818680768

The paper presents a conceptual structure for the organization and representation of textual and visual information. A generic conceptual structure is proposed which contributes to new forms of visual navigation and interactivity within large collections of textual and visual data. This can assist in the exploration, discovery and extraction of relevant information. An application of the approach is illustrated in the domain of design which is characterized by large amounts of unstructured and poorly organized information of project descriptions.

关键词： Information retrieval systems

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An interactive interface for visualizing and analyzing multi-spectral solar images

An interactive interface for visualizing and analyzing multi...

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conference on visual data exploration and analysis iv

作者： Hurlburt, NE Shine, RA Tarbell, TD Lockheed-Martin Advanced Technology Center Organizaton H1-12 B252 Palo Alto CA 94304 United States

ISBN: (纸本)0819424285

We present an interactive software tool for manipulating image data, especially high resolution multi-spectral solar movies and images from several different instruments. This tool contains procedures for distortion removal for ground based solar movies, correlation tracking, image alignments, data compression, 3-D Fourier filtering, interactive viewing of space/time slices in movies, and browsing through (x,y,t) data cubes. This is a complete public domain package based on X windows and Unix which is currently running on Silicon Graphics and Digital Equipment workstations. These software tools are freely available to the international solar community. Many components are also applicable to image and movie analysis in astrophysics, space physics, and earth sciences. They are available with documentation via our web pages under http://***. ***.

关键词： image analysis solar physics optical flow methods

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An efficient application-independent visualization engine for information with complex data structure

An efficient application-independent visualization engine fo...

引用

conference on visual data exploration and analysis iv

作者： Tseng, FWC Meliksetian, DS Chen, CYR Avanti Corporation Syracuse University Syracuse NY 13244 United States Department of Electrical Engineering and Computer Science Syracuse University Syracuse NY 13244 United States

ISBN: (纸本)0819424285

A novel layered visualization model is proposed to provide a systematic approach for visualizing and manipulating information with complex structure, A heterogeneous multiple level composite container type concept is introduced to model any arbitrary complex data structure. The necessary visualization and manipulation strategies are also provided within the model. Based on the model, an efficient application-independent visualization engine has been designed and implemented. A type wrapper concept is used to provide a general application interface. Applications can easily interact with the visualization engine by registering application-dependent type wrappers into the engine. The engine has been used as the graphical interface to a distributed object-oriented multimedia database management system.

关键词： application-independent information visualization engine complex data structure visualization information visualization visualization model

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Biomedical visualization toolkit in Java

Biomedical visualization toolkit in Java

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conference on visual data exploration and analysis iv

作者： Rodrigues, L Chaltry, E Quinn, T Compuware Corp. (United States)

ISBN: (纸本)0819424285

Software written in the Java programming language is platform independent, remotely executable and downloadable on demand In this paper, we describe a toolkit developed in Java for the purpose of visualizing and analyzing biomedical images. It is comprised of a number of class libraries that enable selection, viewing, manipulation and analysis of biomedical images. Java's class libraries and special features such as interfaces, multithreading etc., are extensively used in the design and implementation of the toolkit. The current version of the visualization toolkit supports viewing of JPEG and GIF images only. A medical image viewer developed using this toolkit can be used by doctors in hospitals, offices or at any other locations using a Java-enabled web browser running on a variety of hardware/software platforms.

关键词： Java Virtual Machine JIT compiler platform independence applet window and level region of interest double buffering asynchronous operation image manipulation image analysis

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Collaboration and visual steering of simulations

Collaboration and visual steering of simulations

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conference on visual data exploration and analysis iv

作者： Zou, S Ribarsky, W Jean, Y Heiner, J Schwan, K Sumner, B Okuma, O Georgia Institute of Technology (United States) Lucent Technologies Bell Labs. (United States)

ISBN: (纸本)0819424285

This paper presents a structure and set of tools to address the needs of groups of scientists working on large, time-dependent simulations. It describes a direct manipulation, 3D steering environment that is integrated with a controller for instrumenting parallel computations, collecting output, and passing it in binary made between heterogeneous machines, The instrumentation allows collection of data at chosen points in the model and control of the computation through changes of parameters or insertion of alternate data. The steering interface and controller are joined with a library of collaborative communication tools, With these tools a user may steer a simulation and share both the steering input and visual output with one or several colleagues, The tools permit the trading of steering and visualization tools within the group. In addition a lime-dependent steering interface has been introduced. Here time is treated on exactly the same basis as the spatial dimensions so there is a 4D environment, 3 shown spatially and one through animation. The steering interface is built upon a flexible visualization/analysis system. This permits the immediate display of time-dependent results from the dynamic simulations and refined interaction with the results to bring out the character and correlations of multivariate data. The user can then launch new simulations at any stage in this exploration using the visualization to define and focus the simulation parameters, region of interest, and time frame.

关键词： computational steering computer simulation visualization collaboration collaborative work distributed computing 3D graphical interface

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Software framework for visualizing space-variant image filters

Software framework for visualizing space-variant image filte...

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conference on visual data exploration and analysis iv

作者： Moore, KW Tsui, K CSIRO Mathematical Information Sciences (Australia)

ISBN: (纸本)0819424285

We have developed a software framework that simplifies the task of implementing, controlling, and visualizing space-variant image filters. A filter's behaviour over an image is dictated by the parameters that control it. The values of each parameter can be data, geometric, algorithmic, or user dependent. We call this the parameter's source-dependence. Parameters can also vary over any number of image dimensions (a spatially-invariant parameter has dimensionality of 0). We call this the parameter's dimensionality-dependence. Using the parameter dependence classification scheme as a base, the software framework provides tools that allow visualization of filter properties, and where appropriate, interactive user control. A median filter is a simple example of a data dependent (adaptive) filter. We make explicit the components of data analysis and filtering, and use it to show how filter properties can be visualized. A space-variant band-pass filter, used in seismic data processing, shows how user interaction can be incorporated into the framework. Finally, a simple geometric warp shows how geometric (and algorithmic) dependent filters benefit.

关键词： space-variant filtering visualization interactive filtering band-pass filtering seismic data filtering median filter warping

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data generation and data visualization using different platform computers in the World Wide Web environment

Data generation and data visualization using different platf...

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conference on visual data exploration and analysis iv

作者： Chen, PC Fujitsu America Inc. (United States)

ISBN: (纸本)0819424285

At the IS&T and SPIE 96 conference, the author reported a successful cooperative visualization case study that involved using an internet web-browser for data dissemination and data visualization applications between the U.S. and Japanese offices. This cooperative visualization effort using computers and the web-browser has been evaluated, and it has pointed the way to the current research involving the use of the World Wide Web environment for realtime simulation and interactive visualization. Since the spring of 1996, the author has been using Fujitsu's new multi-processor supercomputer VPP300 for fast numerical model simulations and data generations. Meanwhile, the web technology has been advancing very quickly, and it now provides many tools and methods for the scientific visualization. In the summer of 1996, the author began to work on a prototype for a realtime supercomputing interactive visualization system based on the available World Wide Web browser tools and a Fujitsu visualization software known as VisLink. The intranet version of this system was completed in December 1996, and the internet version has been developed and will be completed in the summer of 1997. Design issues and a case study of the prototype will be discussed in this paper.

关键词： scientific visualization realtime simulation interactive visualization weather simulation numerical weather prediction supercomputing world wide web Internet communications

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Real-time visualization of interactive parameter changes in image processing systems

Real-time visualization of interactive parameter changes in ...

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conference on visual data exploration and analysis iv

作者： Schneider, W Eckstein, W Steger, C Technische Univ. Muenchen (Germany)

ISBN: (纸本)0819424285

The main focus of this contribution is the description of mechanisms for an intuitive input of user-data with a direct response to gain fast parameter selection. To build polymorph input methods for different parameter classes, a database containing knowledge about each operator is needed. This information about the syntactical and semantical structure is used to create adequate dialog elements, like sliders, list boxes, text fields, etc., each one responsible for a distinct parameter class. In addition higher-level semantics are used to aggregate data types, e.g., the user can draw a rectangle interactively, instead of only inputting the coordinates of its corners. Depending on the context, the user can also change certain subsets of the knowledge about the operator to fit special needs. Incremental computation of the results of an operator by successively expanding regions of interest is used to gain direct feedback for every change of parameter values. So by dragging a slider for the size of a smoothing mask, e.g., the user can see the effect directly and thus select the desired value rapidly. This approach is extended to sequences of operators. In this case, more than one parameter form will be open at the same time, one for each relevant operator, to have full control of all important values.

关键词： data visualization human-factors and ergonomics issues interaction and user interfaces interactive tools image processing

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visualization tools for data assimilation

Visualization tools for data assimilation

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conference on visual data exploration and analysis iv

作者： Djurcilov, S Pang, A Univ. of California/Santa Cruz (United States)

ISBN: (纸本)0819424285

Weather forecasts are typically produced once or twice each day. Each run usually covers several forecast periods. Over the course of the day, as measured sensor data becomes available, discrepancies between observations and model forecasts are resolved and integrated so as to update and improve the next forecast run. The process of resolving the differences between model output and sensor measurements is known as data assimilation. Traditional methods include kriging and optimal interpolation. They involve statistical and historical information on reliability of sensor measurements (including desirability of sensor location, calibration, etc.), variability of the field, model resolution, initial and boundary conditions, etc. Some of the parameters of a data assimilation model are integration techniques, choice and frequency of incremental update methods, interpolation algorithms, resolution of the model grid, estimation filtering and smoothing algorithms and finite differencing schemes. All of these parameters can have a profound effect on the tendencies displayed by a forecasting model. Hence, having visualization tools to display these possibly conflicting information is very useful for the scientists in quickly identifying regions of high conflict and/or regions of low confidence levels. Allowing the scientists to control the data assimilation variables can assist in constructing a protocol that is appropriate for a specific geographical region. This paper presents a suite of visualization tools to aid scientists in performing their data assimilation analyses. These tools will provide an integrated display of 3D model outputs with OD point measurements from meteorological stations, 1D measurements from wind profilers, sonde, and floating buoys, 2D measurements from CODAR current measurements and GOES satellite feed, and, when available, 3D volume measurements from NEXRAD data. The tools provided here will help extend the 2D domain in which data assimilation is c

关键词： comparative visualization differences kriging spatial and temporal interpolation multiquadrics forecasting

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