Focus of attention+context and smart visibility in visualization

  • Authors:
  • Ivan Viola;Mario Costa Sousa

  • Affiliations:
  • Vienna University of Technology;University of Calgary

  • Venue:
  • ACM SIGGRAPH 2006 Courses
  • Year:
  • 2006

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Abstract

In this part of the course we first discuss smart visibility techniques that provide maximal visual information through dynamic change in visual representation. Such techniques originate from technical illustration and are called cut-away views or ghosted views. We discuss basic principles and techniques for automatic generation of cut-away and ghosted visualizations. One approach is importance-driven feature enhancement, where the visibility of a particular feature is determined according to assigned importance information. The most appropriate level of abstraction is specified automatically to unveil the most important information. Additionally we show the applicability of cut-away views on particular visualization examples. The specific application of cut-away views in computer-assisted angiography will be discussed in more detail.The second category of smart visibility techniques are based on modification of the spatial arrangement of structures. Such techniques are closely related to exploded views, often used for assembly instructions. We discuss visualization techniques that separate context information to unveil the inner focus information by splitting the context into parts and moving them apart. Another visualization technique enables browsing within the data by applying deformations like leafing, peeling, or spreading. In the case of time-varying data we present another visualization technique which is related to exploded views and is denoted as fanning in time.