Object recognition in clutter: cortical responses depend on the type of learning
MetadataShow full item record
AbstractTheoretical studies suggest that the visual system uses prior knowledge of visual objects to recognize them in visual clutter, and posit that the strategies for recognizing objects in clutter may differ depending on whether or not the object was learned in clutter to begin with. We tested this hypothesis using functional magnetic resonance imaging (fMRI) of human subjects. We trained subjects to recognize naturalistic, yet novel objects in strong or weak clutter. We then tested subjects' recognition performance for both sets of objects in strong clutter. We found many brain regions that were differentially responsive to objects during object recognition depending on whether they were learned in strong or weak clutter. In particular, the responses of the left fusiform gyrus (FG) reliably reflected, on a trial-to-trial basis, subjects' object recognition performance for objects learned in the presence of strong clutter. These results indicate that the visual system does not use a single, general-purpose mechanism to cope with clutter. Instead, there are two distinct spatial patterns of activation whose responses are attributable not to the visual context in which the objects were seen, but to the context in which the objects were learned.
CitationFront Hum Neurosci. 2012 Jun 19; 6:170
- There Is a "U" in Clutter: Evidence for Robust Sparse Codes Underlying Clutter Tolerance in Human Vision.
- Authors: Cox PH, Riesenhuber M
- Issue date: 2015 Oct 21
- Clutter modulates the representation of target objects in the human occipitotemporal cortex.
- Authors: Erez Y, Yovel G
- Issue date: 2014 Mar
- Category selectivity in the ventral visual pathway confers robustness to clutter and diverted attention.
- Authors: Reddy L, Kanwisher N
- Issue date: 2007 Dec 4
- Two-stage perceptual learning to break visual crowding.
- Authors: Zhu Z, Fan Z, Fang F
- Issue date: 2016
- Static images of novel, moveable objects learned through touch activate visual area hMT+.
- Authors: Chan JS, Simões-Franklin C, Garavan H, Newell FN
- Issue date: 2010 Jan 15