halo a virtual periphery for small screens devices

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haloa virtual periphery for small screens
devices

• patrick baudischmicrosoft research,
  visualization and interaction research
• may 25th, AVI 2004 workshop
• personalized information access

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the problem
personalized information system that tells
meabout restaurants (or attractions in theme
park or)
for timely deliveryI am using a PDAto view all
options
doesnt just tell me what to do,allows me to
choose for current situation
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halo
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contents

• halo is not a focus plus context
  technique(related work)
• halo is a lamp shining onto the street(designing
  halo)
• halo is 16-33 faster than arrow-based
  visualization techniques (user study)
• build interactive halo applications!
  (conclusions, lessons learned)

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related work

• driving directionsvs. route planning aids
• overview-plus-detail
• focus-plus-context
• pointing into off-screen space

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• halo design

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cinematography

• entry and exit points
• point of view?arrow-based techniques
• partially out of the frame? halo
• rings are familiar, graceful degradation

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streetlamps

• aura visible from distance
• aura is round
• overlapping auras aggregate
• fading of aura indicates distance
• what we changed
• smooth transition ? sharp edge
• disks ? rings
• dark background ? light background

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reserve space for content
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arc length distance
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handling many objects

• find best (restaurant) relevance cut-off
• see all (dangers) merge arcs

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app designers can use

• color
• texture
• arc thickness

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• user study

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interfaces

• arc/arrow fading off
• scale 110-300m/cm
• map as backdrop
• readability ok
• same selectable size
• hypothesis
• halo faster

legend
halo ring
distance from display border
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pre-study to define tasks

• 8 participants (6 GPS users, 2 PDA users)
• informal interviews 10-40 minutes
• ? 4 tasks to be used in study

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1. locate task
? had tosimulate on PC
click at expected location of off-screen targets
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2. closest task
click arrow/arc or off-screen location closest to
car
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3. traverse task
click all five targets so as to form shortest path
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4. avoid task
click on hospital farthest away from traffic jams
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procedure

• 12 participants
• within subject design, counterbalanced
• four training maps per interface/task,then eight
  timed maps
• questionnaire

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task completion time
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error rate
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subjective preference
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conclusions

• halo 16-33 faster than arrows
• no split attention
• distortion-free space
• scale independent
• no need to annotate distance
• perceive all rings at once treisman gormican
• limitation max number or rings
• future work applications where peripheral
  objects move and change

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thanks!

• read more at
• www.patrickbaudisch.com
• more cool stuff
• stitching we 1100am
• fishnet thu 1130am
• thanks to
• ruth rosenholtz
• scott minneman
• allison woodruff
• the vibe gang

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Extra
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