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- Sensitivity to 3D orientation in textured surfaces
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Sensitivity to 3D orientation in textured surfaces Liu, Geniva
Abstract
The present study investigated depicted 3D orientation in texture gradients as a potential feature to represent data attributes in scientific visualization applications. The task was to detect and/or localize texture elements that varied across two components of 3D orientation, theta (left-right orientation differences from y-axis) and phi (rotation about the y-axis). Experiment 1 determined observers' detection sensitivity to orientation-defined 3D targets, and revealed that detection performance for 3D targets was based on depicted 3D orientation rather than 2D image orientation. In Experiment 2, the detection task was followed by a localization via direct action (pointing to an onscreen location) or indirect action (making a spatially mapped keypress). Results showed that if targets were correctly detected, they were also localized to the visual field quadrant, with accuracy generally being higher for direct action responses. Additionally, observers showed an ability to localize targets that they failed to detect. Experiment 3 demonstrated that, compared to performance of the component tasks alone, detection and direct localization did not suffer in a dual-task context, but indirect localization did. These results support a dual visual systems theory that postulates separate processing streams that specialize in processing visual information for action or perception. Results also have practical implications for how 3D orientation can be used in visualization applications.
Item Metadata
Title |
Sensitivity to 3D orientation in textured surfaces
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2001
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Description |
The present study investigated depicted 3D orientation in texture gradients as a potential feature
to represent data attributes in scientific visualization applications. The task was to detect and/or
localize texture elements that varied across two components of 3D orientation, theta (left-right
orientation differences from y-axis) and phi (rotation about the y-axis). Experiment 1 determined
observers' detection sensitivity to orientation-defined 3D targets, and revealed that detection
performance for 3D targets was based on depicted 3D orientation rather than 2D image
orientation. In Experiment 2, the detection task was followed by a localization via direct action
(pointing to an onscreen location) or indirect action (making a spatially mapped keypress).
Results showed that if targets were correctly detected, they were also localized to the visual field
quadrant, with accuracy generally being higher for direct action responses. Additionally,
observers showed an ability to localize targets that they failed to detect. Experiment 3
demonstrated that, compared to performance of the component tasks alone, detection and direct
localization did not suffer in a dual-task context, but indirect localization did. These results
support a dual visual systems theory that postulates separate processing streams that specialize in
processing visual information for action or perception. Results also have practical implications
for how 3D orientation can be used in visualization applications.
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Extent |
3845165 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-08-06
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0090151
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2001-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.