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Updated: Jul 17, 2026

Motion-Acuity Test for Visual Field Acuity Measurement with Motion-Defined Shapes
Published on: February 23, 2024
Recognition of biological motion from blurred natural scenes
Simone Kuhlmann1, Markus Lappe
1General Psychology, Psychological Institute II, Westfälische Wilhelms-Universität, Fliednerstrasse 21, D 48149 Münster, Germany. kuhlmans@psy.uni-muenster.de
Abstract:
Biological-motion perception can be regarded as a template-matching process. We are concerned with the visual cues in this template. Biological-motion perception is usually studied with point-light displays similar to the point-light displays invented by Johansson (1973 Perception and Psychophysics 14 201 - 211). These stimuli are in some ways abstract. In order to use more natural stimuli, we recorded movies of different actions in natural scenes. By blurring the scenes we modified the visual cues, particularly the local form and motion information. Observers were asked to identify the action portrayed. Our results demonstrate that templates for biological-motion recognition combine global form and motion cues. Reductions of local form and local motion information by blurring can be compensated by global form change and global motion. Local motion information is also used for segmentation.
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