1. Dynamic Focus + Context for Volume Rendering
Peter Sikachev
Institute of Computer Graphics and Algorithms
Vienna University of Technology

2. Primary interest (focus) Surrounding information (context)
Focus + Context?
Primary interest (focus)
Full detail
Surrounding information (context)
Reduced detail
Peter Sikachev

3. Example
image courtesy of Stefan Bruckner
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4. Example
image courtesy of Stefan Bruckner
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5. Example
image courtesy of Stefan Bruckner
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6. Example
image courtesy of Stefan Bruckner
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7. More examples
image courtesy of Stefan Bruckner and Nucleus Medical Art
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8. Focus + Context Drawbacks
Front surface is usually removed or made less visible
Though it preserves context, spatial orientation might be lost
image courtesy of Ivan Viola
Peter Sikachev

9. Animating Focus
Woodring and Shen 2007
Peter Sikachev

10. Focus + Context Models
Peter Sikachev

11. Focus + Context Models
Peter Sikachev

12. Focus + Context Models
Peter Sikachev

13. Dynamic Focus + Context Pipeline
Peter Sikachev

14. Dynamic Focus + Context Pipeline
cursor position
button events
etc
Peter Sikachev

15. Dynamic Focus + Context Pipeline
duration of interaction
zooming in/out
etc
Peter Sikachev

16. Dynamic Focus + Context Pipeline
generating dynamic style parameters
Peter Sikachev

17. Dynamic Focus + Context Pipeline
DVR-MIP (MIDA)
Radial opacity change
Other focus+context techniques
Peter Sikachev

18. Rotation example
Peter Sikachev

19. Rotation example
Peter Sikachev

20. Rotation example
Peter Sikachev

21. Rotation example
Peter Sikachev

22. Rotation example
Peter Sikachev

23. Rotation example
Peter Sikachev

24. Rotation example
Peter Sikachev

25. Video (rotation, DVR-MIP)
Peter Sikachev

26. Video (rotation+zooming, opacity change)
Peter Sikachev

27. Video (panning)
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28. User Study
Peter Sikachev

29. Manual or dynamic f+c change 2 tasks
User Study
Teaching video
Manual or dynamic f+c change
2 tasks
Peter Sikachev

30. Manual or dynamic f+c change 2 tasks on synthetic datasets
User Study
Teaching video
Manual or dynamic f+c change
2 tasks on synthetic datasets
Find the number of spheres inside spheres
Peter Sikachev

31. Manual or dynamic f+c change 2 tasks on synthetic datasets
User Study
Teaching video
Manual or dynamic f+c change
2 tasks on synthetic datasets
Find the number of spheres inside spheres
Find the shortest distance between equicolored spheres
Peter Sikachev

32. Manual or dynamic f+c change 2 tasks on synthetic datasets
User Study
Teaching video
Manual or dynamic f+c change
2 tasks on synthetic datasets
Find the number of spheres inside spheres
Find the shortest distance between equicolored spheres
Questionnaire
Peter Sikachev

33. Proposed technique allows interact less with GUI to get the result
User Study: Results
Proposed technique allows interact less with GUI to get the result
Some users make fewer mistakes and complete tasks faster
All users need more time to adjust
Peter Sikachev

34. Questions?
Peter Sikachev