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What makes a scene? Fast scene categorization as a function of global scene information at different resolutions
Sandro L Wiesmann1, Melissa Le-Hoa Võ1
1Department of Psychology.
Summary
Global scene properties aid environmental categorization, but are insufficient alone. Localized information, particularly object details, is crucial for accurate and fast scene perception, even with brief exposures.
Area of Science:
- Cognitive Psychology
- Computational Neuroscience
- Computer Vision
Background:
- Scene categorization is vital for environmental interaction.
- Previous research suggests global scene properties facilitate rapid scene processing.
Purpose of the Study:
- To causally investigate the role of global scene properties in scene categorization.
- To determine the necessity of localized object information for accurate scene perception.
Main Methods:
- Experimentally reduced scene images to varying degrees of spatial resolution.
- Assessed human observers' categorization accuracy under different stimulus conditions.
- Varied stimulus presentation time (e.g., 30 ms) and image resolution.
Main Results:
- Above-chance categorization accuracy was achieved using global scene properties.
- Higher image resolution correlated with improved categorization performance.
- Performance with reduced stimuli was significantly lower than with unmanipulated images.
- Object identification in higher-resolution stimuli was linked to better scene categorization.
Conclusions:
- Global scene properties are useful but not sufficient for rapid scene categorization.
- Localized information, likely conveying object identities, is essential for efficient scene perception.
- Fast scene categorization relies on a combination of global and local visual cues.
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