Wedge

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Sean Gustafson Patrick Baudisch Carl
Gutwin Pourang Irani
wedge
clutter-free visualization of
off-screen locations
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wedge
halo clutter problem
wedge avoids overlap
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ated
rel
work
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overviews
Plaisant 95 and many others
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fisheye views
fisheye views
Carpendale 01
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edgeradar
Gustafson 07
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simple arrows
Tecmo Bowl 87
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scaled and stretched arrows
Burigat 06
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city lights
space-efficient fisheye technique
Mackinlay 03
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halo
Baudisch 03
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halo
Baudisch 03
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e
th
problem
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the problem clutter
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the problem clutter
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(also not great corners)
side
corner
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initial approaches
ovals
clustering
Baudisch Rosenholtz
Irani et al.
cut lines
color
separatevisually
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separate geometrically

• circles offer only a single degree of freedom
  radius (aka intrusion)
• in some cases varying allows resolving
  overlap,in others it does not
• how can we get additional degrees of freedom?

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e
th
wedge
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wedge
base
base
base
base
leg
leg
target
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halo
wedge
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3 degrees of freedom
intrusion
aperture
rotation
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avoiding overlap
intrusion
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out
lay
algorithm
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avoidance algorithm
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avoidance algorithm
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avoidance algorithm
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avoidance algorithm
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avoidance algorithm
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leaves 2 degrees
intrusion distance base-width distance
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wedge
demo
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ser
u
study
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• two interface conditions
• halo and wedge

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task 1 locate
same as original halo paper
halo
wedge
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task 2 closest
same as original halo paper
halo
wedge
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task 3 avoid
same as original halo paper
halo
wedge
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IV density
sparse
dense
same as original halo paper
dense, remapped to bottom left corner
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16 participants
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hypotheses

• 1. wedge is more accurate
• larger improvement in dense condition
• larger improvement in corners
• (no hypothesis about task time)

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results
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• no significant difference in task time

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• participants were significantly more accurate
  when using the wedge

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error in pixels
Side
Halo
60
Wedge
40
20
0
Sparse
Dense
locate task
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error in pixels
Side
Corner
Halo
60
Wedge
40
20
0
Sparse
Dense
Sparse
Dense
locate task
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hypotheses
?

• 1. wedge is more accurate
• larger improvement in dense condition
• larger improvement in corners

?
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wedge
fied
uni
pointing
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intrusion ? 0
citylights
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aperture ? 0
stretched arrows
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?
halo
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distance information in corner
distance information along arc
round bases
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aperture ? 360
halo
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eling
mod
pointing
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better layout than this?
?
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(No Transcript)
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beam
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beam
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beam
beam
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beam
orbital
beam
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intrusion
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intrusion
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aperture
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aperture
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rotation
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rotation
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next steps

• run user study with many users to determine
  constants
• write new layout algorithm

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thanks
Sean Gustafson http//www.gustaf.ca/
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(No Transcript)
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recent results
post-publication 20 more participants
Side
Corner
80
Halo
Wedge
60
Error (pixels)
40
20
0
Sparse
Dense
Sparse
Dense
locate task
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recent results
post-publication 20 more participants
Side
Corner
Halo
60
Wedge
40
Error Rate
20
0
Sparse
Dense
Sparse
Dense
closest task