Interaction in Visualization Systems

1
Interaction in Visualization Systems

• CPSC 533C Presentation
• Zhangbo Liu (Zephyr)
• December 7, 2005

2

• Question to this topic
• What Why?

3
Interaction

• Interaction involves the transformations that
  map the data to visual form.
• More than just controls? Integrates controls into
  the visualization.
• Allows for direct manipulations of the graphical
  representation of the data.

4
Examples
Ahlberg Shneideman, The Film Finder
Ware, Chapter10, Information Visualization
Chuah et al., SDM
Munzner,H3
5
Papers

• High interaction graphics. Stephen G. Eick and
  Graham J. Wills. European Journal of Operational
  Research, 81445-459, 1995.
• Interactive Visualization of Genealogical Graphs.
  Michael J. McGuffin and Ravin Balakrishnan. Proc.
  InfoVis 2005.

6
Papers

• High interaction graphics. Stephen G. Eick and
  Graham J. Wills. European Journal of Operational
  Research, 81445-459, 1995.
• Interactive Visualization of Genealogical Graphs.
  Michael J. McGuffin and Ravin Balakrishnan. Proc.
  InfoVis 2005.

7
High Interaction Graphics

• ClarityInformation only on demand, cleaner
  more focused displays, allow a range of options
• RobustnessAvoid drawing inferences from only one
  view
• PowerCombine views, leverage exploration
• Possibility3 dimensional data, animation

8
Principles

• Simple, easy to interpret views
• Information Hiding
• Direct Manipulation
• Linking Brushing

9
Linking and Brushing

• Linking
• Visually showing which parts of one data plot
  correspond to that of another.
• Brushing
• Allowing the users to move a region (brush)
  around the data display to highlight points which
  fall within this region.

10
Examples
Linking altitude to grass and grain types in
Scottish Districts
Districts of the city of Dublin showing areas
with high levels of average income
11
Critique

• Pros
• Very good survey paper for introduction, general
  techniques.
• Easy to read. Seems like the beginning of a book.
• Cons
• Examples were somewhat simple, despite mentioning
  some complex application domains.
• Dated. Open issues are easy nowadays.

12
Papers

• High interaction graphics. Stephen G. Eick and
  Graham J. Wills. European Journal of Operational
  Research, 81445-459, 1995.
• Interactive Visualization of Genealogical Graphs.
  Michael J. McGuffin and Ravin Balakrishnan. Proc.
  InfoVis 2005.

13
Problem

• Family trees are difficult to draw

14
Proposed solution

• Dual-tree based representation

15
Novel Interaction Technique
16
Video
17
User Study

• 1 practicing genealogist
• 1 hour session
• Neural feedbacks, no pros or cons

18
Critique

• Pros
• A nice solution for a generally misunderstood
  graph drawing problem
• Cool interaction technique for collapsing or
  expanding subtrees
• Cons
• Requires some background in genealogy
• Poor user study