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Illusory contour processing in early visual areas: a modeling approach

dc.creatorHui, Min
dc.date.accessioned2020-08-22T20:58:20Z
dc.date.available2008-09-28
dc.date.issued2007-09-28
dc.identifier.urihttps://etd.library.vanderbilt.edu/etd-09062007-082426
dc.identifier.urihttp://hdl.handle.net/1803/14089
dc.description.abstractIn this thesis, a computational model for illusory contour processing in early visual areas is proposed. In the model, image features are first measured in model V1. Then the resulting activities in V1 are fed into V2 cells with non-classical bipole property, which was modeled as the result of activity-dependent synaptic modification. The integrated illusory contour information in model V2 is then delivered to model V1 through excitatory feedback connections. A mechanism of unbalanced feedback synaptic weights to orthogonal domains was proposed to explain both V1 orientation reversal pattern in illusory context and excitatory feedback effects from V2 to V1 in real context. This context-dependent activation pattern in V1 and V2 might be the basis of illusory contour perception. Simulation of the model was provided and the result was consistent with existing physiological and psychophysical data.
dc.format.mimetypeapplication/pdf
dc.subjectsynaptic modification
dc.subjecthorizontal connection
dc.subjectreal-illusory interaction
dc.subjectfeedback
dc.subjectcontour integration
dc.subjectNeurophysiology -- Mathematical models
dc.subjectOptical illusions
dc.subjectcomputational model
dc.subjectspatial weighting function
dc.titleIllusory contour processing in early visual areas: a modeling approach
dc.typethesis
dc.contributor.committeeMemberThomas J. Palmeri
dc.type.materialtext
thesis.degree.nameMA
thesis.degree.levelthesis
thesis.degree.disciplinePsychology
thesis.degree.grantorVanderbilt University
local.embargo.terms2008-09-28
local.embargo.lift2008-09-28
dc.contributor.committeeChairAnna W. roe


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