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  The Role of Co-occurence for View-based Object Recognition

Schwaninger, A., Michel, S., Hofer, F., & Bülthoff, H. (2003). The Role of Co-occurence for View-based Object Recognition. Poster presented at 6. Tübinger Wahrnehmungskonferenz (TWK 2003), Tübingen, Germany.

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 Creators:
Schwaninger, A1, Author              
Michel , S, Author
Hofer, F, Author
Bülthoff, HH1, Author              
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              

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 Abstract: Objects in the real world do not occur in a random manner. For example tea spoons tend to be near tea cups and there is usually a remote control nearby a TV. A cognitive system, which is adapted to the environment, would take such co-occurrences into account and use top-down driven expectancies for faster recognition. Although many object recognition theories assume a serial bottom-up processing and disregard top-down feedback from later stages to earlier ones, neuropsychological and imaging studies suggest recurrent feedback during object identication (e.g., Humphreys, Riddoch and Price, 1997, Philosophical Transactions of the Royal Society of London B, 1275-1282). We present further evidence for top-down in uences in object recognition using a priming approach. In Experiment 1 participants named objects (e.g., TV) in two dierent views (canonical vs. non-canonical), which were preceded by a contextually consistent (e.g., remote control) or inconsistent (e.g., hammer) priming stimulus. We found clear eects of prime consistency and target viewpoint as well as a signicant interaction. Presenting a consistent prime prior to a target reduced the viewpoint dependency signicantly. These results were replicated in Experiment 2 using a contextual association task. Participants had to judge whether the second of two sequentially presented objects tends to co-occur with the rst one. Consistent priming stimuli reduced the viewpoint-dependency of the reaction times to the target objects. Both experiments provided converging evidence for the view, that the human cognitive system uses knowledge of co-occurrence information for faster recognition.

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 Dates: 2003-02
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: BibTex Citekey: SchwaningerMHB2003
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Title: 6. Tübinger Wahrnehmungskonferenz (TWK 2003)
Place of Event: Tübingen, Germany
Start-/End Date: 2003-02-21 - 2003-02-23

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Title: 6. Tübinger Wahrnehmungskonferenz: Sixth Perception Conference at Tübingen, TWK 2003
Source Genre: Proceedings
 Creator(s):
Bülthoff, HH1, Editor            
Gegenfurtner, KR, Editor            
Mallot, HA, Editor            
Ulrich, R, Editor
Wichmann, FA1, Editor            
Affiliations:
1 Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794            
Publ. Info: Kirchentellinsfurt, Germany : Knirsch
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 163 Identifier: ISBN: 3-927091-62-6