Spiking neuron sensory processing apparatus and methods for saliency detection

摘要

Apparatus and methods for salient feature detection by a spiking neuron network. The network may comprise feature-specific units capable of responding to different objects (red and green color). The plasticity mechanism of the network may be configured based on difference between two similarity measures related to activity of different unit types obtained during network training. One similarity measure may be based on activity of units of the same type (red). Another similarity measure may be based on activity of units of one type (red) and another type (green). Similarity measures may comprise a cross-correlogram and/or mutual information determined over an activity window. During network operation, the activity based plasticity mechanism may be used to potentiate connections between units of the same type (red-red). The plasticity mechanism may be used to depress connections between units of different types (red-green). The plasticity mechanism may effectuate detection of salient features in the input.

主权项

1. A method of updating an efficacy of inhibitory connections of a spiking neuron network, the method comprising, for an input signal:
based on a first rule, potentiating a first plurality of inhibitory connections associated with a first portion the network, individual ones of the first plurality of inhibitory connections and a second plurality of inhibitory connections configured to provide inhibitory signals to neurons of the first and the second portions, respectively; and based on a second rule, potentiating the second plurality of inhibitory connections; wherein:
the neurons of the first portion are configured to respond to a first feature;the neurons of the second portion are configured to respond to a second feature;the first rule is configured to cause a first inhibitory signal;the second rule is configured to cause a second inhibitory signal that is smaller than the first inhibitory signal; andthe first rule and the second rule cooperate to suppress the neurons of the first portion from response to the first feature.