US 9,014,416 B1Granted

Sensory processing apparatus and methods

AssigneeBrain Corporation

InventorsDimitry Fisher, Eugene M. Izhikevich, Marius Buibas

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Abstract

Artificial retina may be implemented. A retinal apparatus may comprise an input pixel layer, hidden photoreceptive layer, an output neuron layer, and/or other components. Individual cones of the photoreceptive layer may be configured to receive input stimulus from one or more cones within the cone circle of confusion. The cone dynamic may be described using a diffusive state equation characterized by two variables configured to represent membrane voltage and current. Diffusive horizontal coupling of neighboring cones may effectuate non-separable spatiotemporal response that is configured to respond to contrast reversing and/or coherent moving stimulus. The photoreceptive layer high-pass filtered output may facilitate contrast detection by suppressing time-invariant component of the input and reducing sensitivity of the retina to the static inputs.

Claims21

Dependent claims

An sensory processing apparatus with increased signal to noise ratio (SNR), said apparatus comprising:

an array of sensing elements within a photo-sensitive circuit, said elements of said array configured to receive at least a part of a sensory input;
and
resistive links interconnecting individual ones of the elements within the photo-sensitive circuit so that one or more elements of said array are diffusively coupled to a plurality of nearest-neighbor elements of said array via one or more of said resistive links, said diffusive coupling between said one or more elements and another element of said plurality of nearest neighbor elements provided by the resistive link or links between said one or more elements and another element of said plurality of nearest neighbor elements is capable of causing an increased output from said one or more elements responsive to said input comprising spatially coherent stimulus, relative to output from said one or more elements responsive to said input comprising spatially randomly distributed stimulus;
wherein:
said diffusive coupling between said one or more elements and another element of said plurality of nearest neighbor elements is capable of causing a decreased output from said one or more elements responsive to said input comprising said spatially randomly distributed stimulus, relative to output from said one or more elements responsive to said input comprising said coherent stimulus;
and
said increased output and said decreased output collaborate to effectuate said increased SNR.

4 more elements

An sensory processing apparatus with increased signal to noise ratio (SNR), said apparatus comprising:

means for sensing within a photo-sensitive circuit, said means for sensing being configured to receive at least a part of a sensory input;
and
means for interconnecting individual ones of the elements within the photo-sensitive circuit so that one or more elements of said means for sensing are diffusively coupled to a plurality of nearest-neighbor elements of said means for sensing via said means for interconnecting, said diffusive coupling between said one or more elements and another element of said plurality of nearest neighbor elements provided by the means for interconnecting between said one or more elements and another element of said plurality of nearest neighbor elements is capable of causing an increased output from said one or more elements responsive to said input comprising spatially coherent stimulus, relative to output from said one or more elements responsive to said input comprising spatially randomly distributed stimulus;
wherein:
said diffusive coupling between said one or more elements and another element of said plurality of nearest neighbor elements is capable of causing a decreased output from said one or more elements responsive to said input comprising said spatially randomly distributed stimulus, relative to output from said one or more elements responsive to said input comprising said coherent stimulus;
and
said increased output and said decreased output collaborate to effectuate said increased SNR.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/540,429Filed 2 Jul 2012 · continuation
Priority: 29 Jun 2012
Granted: 21 Apr 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G06N 3/063
Physical realisation, i.e. hardware implementation of neural networks, neurons or parts of neurons: using electronic means
G06V 10/20
Arrangements for image or video recognition or understanding: image preprocessing
G06V 30/195
Using simultaneous comparisons or correlations of the image signals with a plurality of references: using a resistor matrix
H04N 25/00
Circuitry of solid-state image sensors [ssis]