1. Layout of Multiple Views for Volume Visualization: A User Study Daniel Lewis, Steve Haroz, Kwan-Liu Ma University of California, Davis

2. Outline Background Motivation and Problem Statement How we approached problem Study Results Conclusions 2

3. Outline Background Motivation and Problem Statement How we approached problem Study Results Conclusions 3

4. Background Limitations of 3D vis software Human-interaction important Past research: Multiple-views Constraint example 4

5. Outline Background Motivation and Problem Statement How we approached problem Study Results Conclusions 5

6. 6 Motivation and Problem Problem: Effectiveness (time) of layout flexibility for volume visualization Hypothesis: Constrained multiple-views best for time- variant data

7. Outline Background Motivation and Problem Statement How we approached problem Study Results Conclusions 7

8. 8 Layout Simple Split Radial Freeform

9. 9 Program

10. 10 Datasets

11. Outline Motivation and Problem Statement How we approached problem Study Results Conclusions 11

12. 12 1 st Study Between subject Time-invariant & Time-variant w/ 2 layouts 24 participants Tutorial and practice Data sets: Brain (invariant) and Vortex (variant)

13. 13 2 nd Study Within-subject Time-variant 12 participants Tutorial and practice Tracked size of brain tumor

14. Outline Motivation and Problem Statement How we approached problem Study Results Conclusions 14

15. 15 Between-Subject Results Time Invariant Time Variant

16. 16 Within-Subject Results Time Variant

17. 17 Time Variant Data Results Test 1: Between-Subject Test 2: Within-Subject

18. Outline Motivation and Problem Statement How we approached problem Study Results Conclusions 18

19. 19 Conclusions Time-invariant: NO effect on accuracy, speed, performance Time-variant: Multiple Views > Single View

20. 20 Conclusions Hypothesis NOT supported Layout flexibility does NOT effect performance

21. Discussion and Future Works Benefit of flexibility offsets time spent Future Works More test subjects More tests with specialist More and varied layouts 21

22. 22 Acknowledgement Support : NSF under grants IIS-0552334 ACI-0222991 Thanks to all of our participants. Any Questions?

23. 23 Questions Any Questions?

24. 24 Datasets

25. 25 Program