Very nice, concise description of the Spatial Pooler. Thanks Fergal.
On Wed, Aug 7, 2013 at 8:32 AM, Fergal Byrne <[email protected]>wrote: > > Hi Francisco, > > The Spatial Pooler is an artefact of NuPIC; it simulates the way a layer > of columns becomes activated by feedforward inputs. In essence, the > algorithm is: > > Get all columns to check their feedforward dendrite and generate an > activation score. > Pick the top 2% of columns based on activation score and activate them. > Update the permanences on the feedforward dendrites. > > In the neocortex, the columns do this themselves, and they pick the top > 2% (may vary) by higher-score columns inhibiting nearby lower-score > columns. They also update their own synapses themselves. > > So the SP is simulating the inter-region communication as well as the > single-region sensory communication. > > Regards, > > Fergal Byrne > > > _______________________________________________ > nupic mailing list > [email protected] > http://lists.numenta.org/mailman/listinfo/nupic_lists.numenta.org > >
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