Browsing CBMM Memo Series by Author "Leibo, Joel Z."

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    • How Important is Weight Symmetry in Backpropagation? 

      Liao, Qianli; Leibo, Joel Z.; Poggio, Tomaso (Center for Brains, Minds and Machines (CBMM), arXiv, 2015-11-29)
      Gradient backpropagation (BP) requires symmetric feedforward and feedback connections—the same weights must be used for forward and backward passes. This “weight transport problem” [1] is thought to be one of the main ...

    • View-tolerant face recognition and Hebbian learning imply mirror-symmetric neural tuning to head orientation 

      Leibo, Joel Z.; Liao, Qianli; Freiwald, Winrich; Anselmi, Fabio; Poggio, Tomaso (Center for Brains, Minds and Machines (CBMM), arXiv, 2016-06-03)
      The primate brain contains a hierarchy of visual areas, dubbed the ventral stream, which rapidly computes object representations that are both specific for object identity and relatively robust against identity-preserving ...