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Seminar: 10/5 - Bruno Olshausen

11:00 to 12:30 PM      at:  

Helen Wills Neuroscience Institute and School of Optometry, UC Berkeley
Sparse coding and invariance in visual cortex.

There is now much theoretical and experimental support for the idea of feature selectivity and sparse coding in visual and other sensory cortical areas.  At the same time, it is widely believed that higher cortical areas are involved in representing invariances of the environment, and "slowness" has been proposed as a potential coding objective for achieving this.  Here I will discuss the relation between sparseness and slowness, and preliminary efforts to combine these two objectives into a single framework.  The model raises a number of intriguing questions regarding the nature of cortical representation that can be tested experimentally.