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Dynamic Visual Content
An Introduction


Prof. David Bernstein
James Madison University

Computer Science Department
bernstdh@jmu.edu

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Terminology
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  • Dynamic Visual Content
    • Visual content that changes over time
  • Commonly Used Terms
    • Movie
    • Video
    • Animation
    • Marquee
Terminology (cont.)
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  • Animate
    • To give life or motion
  • Animation
    • A group of techniques that can make visual content appear to move
Approaches
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Samples and Descriptions

images/dynamic-visual-content.gif
An Important Observation
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The approach used to represent the dynamics (i.e., to animate the visual content) is independent of the approach that is used to represent the (static) visual content.

Sampled Dynamics
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A Conceptual Model

images/dynamic-sampling.gif
Sampled Dynamics (cont.)
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  • Examples:
    • Flip-Book Animation
    • Movie Film
  • Some Terms:
    • Frame animation
    • The frame rate
Described Dynamics
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  • The Concept:
    • Describe the way the visual "stream" changes over time
  • Approaches:
    • Start with a discrete set of frames and then describe frame-by-frame changes
    • Start with a set of components (i.e., the "participants" in the "action") and then describe component-by-component changes
Described Dynamics (cont.)
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Summary of Different Approaches

images/dynamic-visual-content-hierarchy.gif
Terminology for Described Dynamics
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  • Sprite:
    • Common Usage - an imaginary being or elf
    • Animation - a discrete piece of visual content that can respond to descriptions of changes
  • Stage:
    • The "component" that sprites act "on"
There's Always More to Learn
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