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GVU Technical Report Series

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Author: Stasko, John T. × Author: Jerding, Dean Frederick ×

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    The Information Mural: A Technique for Displaying and Navigating Large Information Spaces
    (Georgia Institute of Technology, 1997) Jerding, Dean Frederick ; Stasko, John T.
    Information visualizations must allow users to browse information spaces and focus quickly on items of interest. Being able to see some representation of the entire information space provides an initial gestalt overview and gives context to support browsing and search tasks. However, the limited number of pixels on the screen constrain the information bandwidth and make it difficult to completely display large information spaces. The Information Mural is a two-dimensional, reduced representation of an entire information space that fits entirely within a display window or screen. The mural creates a miniature version of the information space using visual attributes such as grayscale shading, intensity, color, and pixel size, along with anti-aliased compression techniques. Information Murals can be used as stand-alone visualizations or in global navigational views. We have built several prototypes to demonstrate the use of Information Murals in visualization applications; subject matter for these views includes computer software, scientific data, text documents, and geographic information.
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    The Information Mural: Increasing Information Bandwidth in Visualizations
    (Georgia Institute of Technology, 1996) Jerding, Dean Frederick ; Stasko, John T.
    Information visualizations must allow users to browse information spaces and focus quickly on items of interest. Being able to see some representation of the entire information space provides an initial gestalt overview and gives context to support browsing and search tasks. However, the limited number of pixels on the screen constrain the information bandwidth and make it difficult to completely display large information spaces. The Information Mural is a two-dimensional, reduced representation of an entire information space that fits entirely within a display window or screen. The mural creates a miniature version of the information space using visual attributes such as grayscale shading, intensity, color, and pixel size, along with anti-aliased compression techniques. Information Murals can be used as stand-alone visualizations or in global navigational views. We have built several prototypes to demonstrate the use of Information Murals in visualization applications; subject matter for these views includes computer software, scientific data, text documents, and geographic information.
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    Visualizing Message Patterns in Object-Oriented Program Executions
    (Georgia Institute of Technology, 1996) Jerding, Dean Frederick ; Stasko, John T. ; Ball, Thomas (Thomas Jaudon)
    The dynamic behavior of object-oriented programs is difficult to design, implement, and modify. Understanding the interactions between classes and objects is necessary to create efficient designs and make safe modifications. This work seeks to identify, visualize, and analyze recurring message patterns in object-oriented program executions as a means for understanding and examining dynamic behavior. Our visualizations focus on supporting design recovery, validation, and reengineering tasks.
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    Using Visualization to Foster Object-Oriented Program Understanding
    (Georgia Institute of Technology, 1994) Jerding, Dean Frederick ; Stasko, John T.
    Software development and maintenance tasks rely on and can benefit from an increased level of program understanding. Object-oriented programming languages provide features which facilitate software maintenance, yet the same features often make object-oriented programs more diffcult to understand. We support the use of program visualization techniques to foster object-oriented program comprehension. This paper identifies ways that visualization can increase program understanding, and presents a means for characterizing both static and dynamic aspects of an object-oriented program. We then describe the implementation of a prototypical tool for visualizing the execution of C++ programs. Based on this work, we define a framework for the visualization of object-oriented software which requires little or no programmer intervention and provides a mechanism which allows users to focus quickly on particular aspects of the program.