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NIPS 07 Report: Mike Lewicki Tutorial on Sensory Coding

Author:movellan @ December 3rd, 2007 2 Comments

  • Mike talked about the problem of why we have ganglian center-surround cells if Gabor happened to be the most efficient code. He showed that by adding a very small weight connectivity coinstraint you end up with Ganglian cells instead of Gabors. This begs the question of why we have Gabors in V1.
  • Mike presented a model that attempts to lean a universal dictionary of texture. It is akin to a hierarchical ICA model. Here is a link to the paper:
    karklin-lewicki-nc05-preprint.pdf It may be interesting to generalize this idea to auditory “textures”.
  • Mike presented his cool work on coding auditory signal’s and Gammatones as optimal encoders. He also seems to have extended the work to learn to detect auditory scenes. You can see his work by following this
    link to Mike’s Research