gaze behaviour during a visual search task · gaze behaviour during a challenging visual search...

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Gaze Behaviour During a

Challenging Visual Search TaskJames Mardell, Mark Witkowski and Robert Spence

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Outline

Scenario

Idea

Experiment

Results

2

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Scenario

3

Wilderness Search and Rescue

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Aerial PhotographySimulated live imagery from an Unmanned Aerial Vehicle (UAV)

4

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Inconspicuous Targets5

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Inconspicuous Targets5

2

1

1

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UAV Camera View

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Idea

8

Static Segmentation of Aerial Photography

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Segmentation

Moving

Segmentation

Degree 1

Segmentation

Degree 4

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Segmentation

Moving

Segmentation

Degree 1

Segmentation

Degree 4

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Segmentation

Moving

Segmentation

Degree 1

Segmentation

Degree 4

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Rapid Serial Visual Presentation

10

Segmentation Degree Tile Duration (ms) Tile Width (Visual Angle °)

1 3,878 22.6

2 970 11.4

3 431 7.6

4 242 5.7

5 155 4.6

6 108 3.8

Segmentation Degree 1

Segmentation Degree 2

Segmentation Degree 3

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Experiment

14

Identifying Targets

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Experimental Setup15

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Experiment

16

24 Subjects

6 Trials per Subject

520,300 Eye Movement Records

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Results

17

Identification and Eye Movements

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Target Identification Results18

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Eye Movements

Constancy of Perception?

19

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Segmentation Degree 1 Segmentation Degree 6

Eye Movements

23

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Constancy of Perception

24

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QuestionsJames Mardell ∙ @keot ∙ http://keot.co.uk/ ∙ james.mardell@imperial.ac.uk

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QuestionsJames Mardell ∙ @keot ∙ http://keot.co.uk/ ∙ james.mardell@imperial.ac.uk