Tuesday, April 30, 2013
IST Lunch Bunch
Decoding Natural Images in the Visual Brain
Diane Beck, Associate Professor of Psychology, University of Illinois at Urbana-Champaign
How is it that humans so quickly recognize objects and scenes? We use both behavioral methods and machine learning techniques applied to fMRI brain data to address this question. Traditional models of recognition usually proceed from the registration of low-level features, to perceptual grouping and segregation processes, and culminating in recognition and categorization processes that link the visual input with stored learned representations. However, we have evidence that this serial model may not be accurate, with object and category knowledge impacting rather than following early visual processing. I will review these data as well as their implications for human vision.