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  Model for the integration of form and shading cues in multi-stable body motion perception

Fedorov, L., & Giese, M. (2016). Model for the integration of form and shading cues in multi-stable body motion perception. Perception, 45(ECVP Abstract Supplement), 368.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-7C63-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-07D8-E
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Fedorov, LA1, Author              
Giese, MA, Author              
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1External Organizations, ou_persistent22              

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 Abstract: Body motion perception from impoverished stimuli, such as point-light motion, shows interesting multi-stability, which disappears in presence of shading cues that suggest depth. Existing models for body motion perception account neither for multi-stability nor for the specific influence of such shading cues.We propose a new model that captures these phenomena. METHOD: We extended a classical hierarchical recognition model for body motion by: (i) a two-dimensional dynamic neural field of snapshot, which reproduces decisions about walking direction and their multi-stability; (ii) a novel hierarchical pathway that processes specifically intrinsic luminance gradients, being invariant against the strong contrast edges on the boundary of the body. RESULTS:We show that the model reproduces the observed multi-stability of perception for unshaded walker silhouettes. The addition of intrinsic shading cues results in monostable unambiguous perception in the model, consistent with psychophysical results. In addition, we show that the novel shading pathway is necessary to accomplish a robust recognition of the relevant intrinsic luminance gradients. CONCLUSIONS: By straight-forward extensions of a classical physiologically-inspired model for body motion recognition we were able to account for the perceptual multistability and the dependence on shading cues of body motion perception.

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 Dates: 2016-12
 Publication Status: Published in print
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 Identifiers: DOI: 10.1177/0301006616671273
BibTex Citekey: FedorovG2016
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Title: 39th European Conference on Visual Perception (ECVP 2016)
Place of Event: Barcelona, Spain
Start-/End Date: 2016-08-29 - 2016-09-01

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Title: Perception
Source Genre: Journal
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Publ. Info: London : Pion Ltd.
Pages: - Volume / Issue: 45 (ECVP Abstract Supplement) Sequence Number: - Start / End Page: 368 Identifier: ISSN: 0301-0066
CoNE: https://pure.mpg.de/cone/journals/resource/954925509369