Videos footage from RuCCS Colloquium Talks can be found on the RuCCS YouTube Channel. For all other events, please check the sponsor's website for more detail.
To filter by event category, click on the event category link in the table below or use the menu on the right.
List of Past Events
Visual Scene Segmentation: The Local/Global puzzle
Monday, February 24, 2003, 02:00pm - 03:00pm
New York University, Center for Neural Science
Early in visual processing the retinal image is highly fragmented, with
each visual neuron having a very small (local) receptive field.� How is
this information 'put back together' to represent the global objects we
consciously perceive?� A common view is that this is done by a
progression of feed-forward connections to higher-order visual areas,
where cells have large receptive fields.� But in the domain of
segmentation -- the process of parsing the retinal image into the
different surfaces comprising the scene -- this view presents serious
challenges.� I will summarize results from psychophysics, modeling and
brain imaging (fMRI) studies that bear on the issue, and propose a
theoretical framework to account for existing data.� In this framework,
feedback from higher-order to early visual cortical areas continuously
plays a role in segmentation.