Contrast- and illumination-invariant object recognition from active sensation


It has been suggested that the deleterious effect of contrast reversal on visual recognition is unique to faces, not objects. Here we show from priming, supervised category learning, and generalization that there is no such thing as general invariance of recognition of non-face objects against contrast reversal and, likewise, changes in direction of illumination. However, when recognition varies with rendering conditions, invariance may be restored, and effects of continuous learning may be reduced, by providing prior object knowledge from active sensation. Our findings suggest that the degree of contrast invariance achieved reflects functional characteristics of object representations learned in a task-dependent fashion.

Publication DOI:
Divisions: College of Health & Life Sciences > School of Psychology
College of Health & Life Sciences > Clinical and Systems Neuroscience
College of Health & Life Sciences > School of Optometry > Centre for Vision and Hearing Research
Uncontrolled Keywords: object recognition,invariant recognition,contrast reversal,direction of illumination,categorisation,Computer Vision and Pattern Recognition,Experimental and Cognitive Psychology
Publication ISSN: 1568-5683
Full Text Link: http://www.inge ... 000005/art00003
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2009-09-01
Authors: Rentschler, Ingo
Osman, Erol
Jüttner, Martin (ORCID Profile 0000-0003-3486-7975)


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