http://www.VRVis.at/
Visually Effective
Information Visualization
for Large Data
Matej Novotný
Matej Novotný
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Visually Effective Information Visualization for Large Data
Information Visualization
Communicate information
through g
raphical
representation of data
Popular in statistics, economy, industry
…
Matej Novotný
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Visually Effective Information Visualization for Large Data
InfoVis techniques
Matej Novotný
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Visually Effective Information Visualization for Large Data
Parallel Coordinates
Axes are placed parallel and a data point
is displayed as
a polyline
[Inselberg1990]
Multiple dimen
-
sions displayed
at once
Matej Novotný
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Visually Effective Information Visualization for Large Data
Parallel Coordinates example
Matej Novotný
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Visually Effective Information Visualization for Large Data
Large Data
Technology development produces
larger and more precise information.
1
0
4
-
10
6
data samples
Large size of the data causes m
any
visualization problems
Matej Novotný
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Visually Effective Information Visualization for Large Data
Large Data Problems
1.
Speed
2.
Occlusion
3.
Aggregation
Matej Novotný
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Visually Effective Information Visualization for Large Data
Solution
–
Visual Abstraction
a simpler graphical representation
that preserves important information
[Hadwiger2003]
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Visually Effective Information Visualization for Large Data
Clustering And Binning
used to provide abstract information
produce groups of similar samples
original data
clustering
binning
Matej Novotný
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Visually Effective Information Visualization for Large Data
Visual Representation
g
roups of lines
-
colored areas
colors
-
diverse yet equally bright
[brewer2003]
transparency improves
overlapping
ordering before rendering
big areas first, small areas
on top of them
Matej Novotný
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Visually Effective Information Visualization for Large Data
Visual Representation cont
’d
texture
shape of cluster
avoids misinterpretation
opacity value
Population of cluster
Density of cluster
Matej Novotný
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Visually Effective Information Visualization for Large Data
Information drill
-
down
Multiple levels of abstraction
Details on demand
Matej Novotný
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Visually Effective Information Visualization for Large Data
Results
–
speed problem
Response time :
380.000 lines
3 sec
260 quads
< 0.1 sec
Matej Novotný
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Visually Effective Information Visualization for Large Data
Results
–
occlusion problem
Fluid dynamics
-
particles with low
turbulency have low dissipation rate
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Visually Effective Information Visualization for Large Data
Results
–
aggregation problem
Most of the data found to be
aggregated in a thin area.
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Visually Effective Information Visualization for Large Data
Conclusions And Future Work
Visual abstraction enhances cluttered
and dense displays
Promising results for the price of a
simple pre
-
processing
Additional research in large data
clustering possible
The concept can be extended to
many other infovis techniques
Matej Novotný
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Visually Effective Information Visualization for Large Data
Acknowledgements
Robert Kosara, Helwig Hauser
VRVis
Matej Novotný
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Visually Effective Information Visualization for Large Data
“The real journey of discovery is
not made by seeking new lands
but by opening new eyes.”
-
Marcel Proust
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