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<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>When:
Thursday,
May 1 @ 10:30am<o:p></o:p></span></font></p>
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font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>Where:
TTI-C Conference Room<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p style='margin:0in;margin-bottom:.0001pt'><font size=3 face=Arial><span
style='font-size:12.0pt;font-family:Arial'>Who:
Tomaso Poggio, Massachusetts Institute of Technology<o:p></o:p></span></font></p>
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font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=3 face=Arial><span
style='font-size:12.0pt;font-family:Arial'>Topic:
Models of
Visual Recognition in the Ventral Stream: towards a theory<o:p></o:p></span></font></p>
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font-family:Arial'><o:p> </o:p></span></font></p>
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font-family:Arial'><o:p> </o:p></span></font></p>
<pre><font size=3 face=Arial><span style='font-size:12.0pt;font-family:Arial'>We will describe a class of quantitative models of the ventral stream for object recognition, which have been developed during the last two decades from the anatomical and physiological data and which are quite successful in explaining several physiological data across different visual areas. Surprisingly, such models also mimic the level of human performance in difficult rapid image categorization tasks in which human vision is forced to operate in a feedforward mode. The main focus of the talk will be on extending these hierarchical models to deal with recognition in image sequences and to account for computational roles of attention and cortical backprojections.<o:p></o:p></span></font></pre><pre><font
size=3 face=Arial><span style='font-size:12.0pt;font-family:Arial'>Finally we will also sketch initial steps with S. Smale, J. Bouvrie and L. Rosasco towards a mathematical theory of hierarchical architectures described by the models of visual cortex.<o:p></o:p></span></font></pre><pre><font
size=3 face=Arial><span style='font-size:12.0pt;font-family:Arial'><o:p> </o:p></span></font></pre><pre><font
size=3 face=Arial><span style='font-size:12.0pt;font-family:Arial'>Relevant papers can be downloaded from: <a
href="http://www.google.com/url?q=http%3A%2F%2Fcbcl.mit.edu%2F&sa=D&sntz=1&usg=AFQjCNHkx1iBMkONZxfG0vgBVILmLOz0eA"
target="_blank"><font color=black><span style='color:windowtext'>http://cbcl.mit.edu/</span></font></a><o:p></o:p></span></font></pre>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
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font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>Contact:
Steve Smale, TTI-C smale@tti-c.org
834-2510<o:p></o:p></span></font></p>
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