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Categorization of natural dynamic audiovisual scenes
Olli Rummukainen1, Jenni Radun2, Toni Virtanen2
1Department of Signal Processing and Acoustics, Aalto University, Espoo, Finland.
Plos One
|May 3, 2014
Summary
This study explored how people perceive dynamic audiovisual scenes. Key factors influencing perception in urban environments include movement, noisiness, and eventfulness, even in scenes lacking salient audio-visual cues.
Area of Science:
- Cognitive Science
- Psychology
- Human-Computer Interaction
Background:
- Natural scene perception research often uses unimodal stimuli.
- Previous studies identified motion (visual) and sound intensity/pitch (auditory) as salient attributes.
- Controlled laboratory studies with natural multimodal stimuli are limited.
Purpose of the Study:
- To analyze perceptual attributes of natural dynamic audiovisual scenes.
- To investigate human attention to similar perceptual attributes in natural scenes.
- To create a perceptual map of stimulus scenes and attributes.
Main Methods:
- Thirty participants completed a similarity categorization task with 19 natural scenes.
- A semi-structured interview followed the task.
- Scenes were presented using an immersive audiovisual display.
Main Results:
- A two-dimensional perceptual map of scenes and attributes was generated.
- Movement, perceived noisiness, and eventfulness were key attributes in urban environments.
- Scene gist properties (openness, expansion) remained important even without salient events.
Conclusions:
- Humans attend to consistent perceptual attributes in natural audiovisual scenes.
- Multimodal scene perception research should advance to real-world environments.
- Stimulus scenes are available as spherical video and sound field recordings.
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