focus of attention for volumetric data inspection
Post on 23-Mar-2016
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Focus of Attention for Volumetric Data Inspection
Ivan Viola1, Miquel Feixas2,Mateu Sbert2, and Meister Eduard Gröller1
1 Institute of Computer Graphics and Algorithms
Vienna University of Technology
2 Institute of Informatics and Applications
University of Girona
I. Viola, M. Feixas, M. Sbert, and M. E. Gröller 2
Goal
Input: known and classified volumetric dataHigh level request: show me feature XOutput: visually pleasing focusing at X
I. Viola, M. Feixas, M. Sbert, and M. E. Gröller 3
Focusing Considerations
Focus discrimination Characteristic viewpointSmart focusing approach
I. Viola, M. Feixas, M. Sbert, and M. E. Gröller 4
Visual Focus Discrimination
Levels of sparsenessDense for focus to visually pop-outSparse for context visually suppressed
Cut-aways to unveil internal features
vessels
intestinekidneys
I. Viola, M. Feixas, M. Sbert, and M. E. Gröller 5
Estimation of Characteristic Viewpoints
o2 o3o1
importance distribution
o1
o2
o3
object selection by user v1
v2
v3
o1
o2
o3
visibility estimationimage-space weight
p(v1)
p(vn)
p(o1|v1)
p(om|vn)
p(o1) p(om)
...
I(vi,O) = p(oj|vi) logΣj
m p(oj|vi)p(oj)
...
...
information-theoretic frameworkfor optimal viewpoint estimation
I. Viola, M. Feixas, M. Sbert, and M. E. Gröller 6
Guided Navigation
Focusing at feature XDiscrimination of X from contextChange to a characteristic viewpoint of X
Refocusing from feature X to feature YDe-emphasis of feature XEmphasis of feature YChange to general characteristic viewpointChange to characteristic viewpoint of Y
I. Viola, M. Feixas, M. Sbert, and M. E. Gröller 7
Refocusing
o1 o2
o3
vc
v1 v2
o1 o2
I. Viola, M. Feixas, M. Sbert, and M. E. Gröller 8
Refocusing
I. Viola, M. Feixas, M. Sbert, and M. E. Gröller 9
Conclusions
Often no need to have all degrees of freedomUsers need smart tools
One image is more than thousands wordsVisual story says more than thousand images
I. Viola, M. Feixas, M. Sbert, and M. E. Gröller 10
Proof
Any Questions?
Thank you for your attention!Any Questions?
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