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  Does contrast reversal affect the recognition of common objects?

Peissig, J., Vuong, Q., Vettel, J., & Tarr, M. (2006). Does contrast reversal affect the recognition of common objects?. Poster presented at 6th Annual Meeting of the Vision Sciences Society (VSS 2006), Sarasota, FL, USA.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-D157-D Version Permalink: http://hdl.handle.net/21.11116/0000-0004-C3D6-E
Genre: Poster

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 Creators:
Peissig, JJ, Author
Vuong, QC1, 2, Author              
Vettel, JM, Author
Tarr, MJ, Author              
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

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 Abstract: Previous research has shown that faces are difficult to recognize when viewed in reverse contrast (Galper, 1970). In a prior study, we demonstrated that this effect can be found with a set of novel objects (Greebles; Vuong et al. 2005), and that the effect was significantly greater for both faces and novel objects with pigment as opposed to those without pigment. This suggests that surface properties are integral in the representation of both faces and objects. However, it is an open question as to whether surface properties play the same role in the recognition of common objects which are not face-like. In addition, objects and faces shown in normal contrast are on average higher in luminance than those shown in reverse contrast. Here, we normalized all images to be equiluminant to eliminate this possible confound. We tested observers in a same/different sequential-matching task using gray scale images of common objects (cars and birds) as well as faces. Replicating prior results, faces were significantly more difficult to recognize when shown in reverse contrast. Importantly, we also found a contrast effect for the common objects; this effect was the same magnitude as the face contrast effect. These results indicate that performance costs associated with contrast reversal are not due to overall luminance differences between normal and reverse contrast images. Additionally, these data suggest that surfaces properties play a similar role in the recognition of all object types, not just those that are biological or face-like.

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 Dates: 2006-06
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1167/6.6.319
BibTex Citekey: 4009
 Degree: -

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Title: 6th Annual Meeting of the Vision Sciences Society (VSS 2006)
Place of Event: Sarasota, FL, USA
Start-/End Date: 2006-05-05 - 2006-05-10

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Title: Journal of Vision
Source Genre: Journal
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Publ. Info: Charlottesville, VA : Scholar One, Inc.
Pages: - Volume / Issue: 6 (6) Sequence Number: - Start / End Page: 319 Identifier: ISSN: 1534-7362
CoNE: https://pure.mpg.de/cone/journals/resource/111061245811050