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Wedge: Clutter-Free Visualization of Off-Screen Locations

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Presentation at CHI 2008 in Florence, Italy. For the paper and video go to: http://www.gustaf.ca/PubSummary/gustafson08

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wedge Sean Gustafson Patrick Baudisch Carl Gutwin Pourang Irani clutter-free visualization of off-screen locations
wedge halo: clutter problem wedge: avoids overlap
ated work rel
overviews [Plaisant 95 and many others]
fisheye views fisheye views [Carpendale 01]
[Gustafson 07] edgeradar
simple arrows [Tecmo Bowl 87]
scaled and stretched arrows [Burigat 06]
space-efficient fisheye technique city lights [Mackinlay 03]
[Baudisch 03] halo
[Baudisch 03] halo
e problem th
the problem: clutter
the problem: clutter
(also not great: corners) corner side
cut lines color ovals clustering Irani et al. Baudisch & Rosenholtz initial approaches separate visually
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? separate geometrically
e wedge th
leg leg target base base base base wedge
halo wedge
3 degrees of freedom rotation aperture intrusion
avoiding overlap intrusion rotation aperture
out algorithm lay
avoidance algorithm
avoidance algorithm
avoidance algorithm
avoidance algorithm
avoidance algorithm
leaves 2 degrees intrusion ~ distance base-width ~ distance
wedge demo
ser study u
two interface conditions halo and wedge
halo task 1: locate wedge same as original halo paper
halo task 2: closest wedge same as original halo paper
halo task 3: avoid wedge same as original halo paper
IV: density sparse dense
16 participants
1. wedge is more accurate larger improvement in dense condition larger improvement in corners (no hypothesis about task time) hypotheses
results
no significant difference in task time
participants were significantly more accurate when using the wedge
error in pixels 60 40 20 0 Sparse Dense Side Wedge Halo locate task
error in pixels Sparse Dense 60 40 20 0 Sparse Dense Side Corner Wedge Halo locate task
1. wedge is more accurate larger improvement in dense condition larger improvement in corners hypotheses
fied pointing uni wedge=
intrusion 0 citylights
aperture 0 stretched arrows
? halo
round bases distance information in corner distance information along arc
halo aperture 360
eling pointing mod
better layout than this? ?
油
beam
beam
beam beam
orbital beam beam
intrusion
intrusion
aperture
aperture
rotation
rotation
run user study with many users to determine constants write new layout algorithm next steps
thanks Sean Gustafson http://www.gustaf.ca/
油
油
recent results post-publication 20 more participants locate task Sparse Dense Error (pixels) 80 60 40 20 0 Sparse Dense Side Corner Wedge Halo
recent results post-publication 20 more participants Sparse Dense Error Rate 60% 40% 20% 0% Sparse Dense Side Corner Wedge Halo closest task

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Wedge: Clutter-Free Visualization of Off-Screen Locations