wedge

Sean GustafsonPatrick BaudischCarl GutwinPourang Irani

clutter-free visualization of off-screen locations

2

wedge

halo: clutter problem wedge: avoids overlap

3

atedworkrel

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overviews

[Plaisant 95 and many others]

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fisheye views

fisheye views

[Carpendale 01]

6 [Gustafson 07]

edgeradar

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simple arrows

[Tecmo Bowl 87]

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scaled and stretched arrows

[Burigat 06]

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“space-efficient fisheye technique”city lights

[Mackinlay 03]

10 [Baudisch 03]

halo

11 [Baudisch 03]

halo

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eproblemth

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the problem: clutter

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the problem: clutter

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corner

(also not great: corners)

side

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cut lines color

ovalsclustering

Irani et al.Baudisch & Rosenholtz

initial approaches

separatevisually

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• 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

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ewedgeth

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leg

legtarget

basebasebasebasewedge

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halo wedge

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3 degrees of freedom

rotationapertureintrusion

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avoiding overlap

rotation

aperture

intrusion

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outalgorithmlay

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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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wedgedemo

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serstudyu

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two interface conditionshalo and wedge

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halo

task 1: locate

wedge

same as original halo paper

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halo

task 2: closest

wedge

same as original halo paper

35

halo

task 3: avoid

wedge

same as original halo paper

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IV: density

sparse dense

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16 participants

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1.wedge is more accurate

2.larger improvement in dense condition

3.larger improvement in corners

(no hypothesis about task time)

hypotheses

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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

60

40

20

0SparseDense

Side

Wedge

Halo

locate task

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error in pixels

SparseDense

60

40

20

0SparseDense

Side Corner

Wedge

Halo

locate task

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1.wedge is more accurate

2.larger improvement in dense condition

3.larger improvement in corners

hypotheses

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fiedpointinguniwedge=

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intrusion 0

citylights

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aperture 0

stretched arrows

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?halo

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round bases

distance information in corner distance information along arc

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halo

aperture 360

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elingpointingmod

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better layout than this?

?

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54

beam

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beam

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beam

beam

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orbitalbeam

beam

58intrusion

59intrusion

60aperture

61aperture

62 rotation

63 rotation

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run user study with many users to determine constants

write new layout algorithm

next steps

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thanksSean Gustafson

http://www.gustaf.ca/

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67

68

recent resultspost-publication20 more participants

locate taskSparseDense

Err

or (

pixe

ls)

80

60

40

20

0SparseDense

SideCorner

WedgeHalo

69

recent resultspost-publication20 more participants

SparseDense

Err

or R

ate

60%

40%

20%

0%SparseDense

SideCorner

WedgeHalo

closest task