Sensory processing apparatus and methods
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.
1. 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.
2. The apparatus of claim 1 , wherein
said spatially coherent input is characterized by a parameter configured constant along at least a dimension encompassing said one or more elements and said another element; and
said constant parameter is capable of causing said increased output.
3. The apparatus of claim 2 , wherein said spatially coherent input comprises a feature of an object undergoing a transformation, said transformation selected from the group consisting of translation, rotation, looming, and receding.
4. The apparatus of claim 1 , wherein said diffusive coupling is configured to cause non-separable time-space response of said sensing elements to said sensory input.
5. The apparatus of claim 1 , wherein said increased output is configured to effectuate said increased SNR.
6. The apparatus of claim 1 , wherein said sensory input comprises one or more signals selected from the group consisting of: (i) visible light signal; (ii) infrared signal; (iii) sound wave signal; (iv) radio frequency wave signal; and (v) electric signal.
7. The apparatus of claim 1 , further comprising:
an array of photo sensors;
wherein:
each element of said array of elements is coupled to one and only one photo sensor.
8. The apparatus of claim 1 , further comprising, an array of photo sensors;
wherein:
each element of said array of elements is coupled to a subset of said array of photo sensors, said subset being characterized by a spatial extent; and
said spatial extent exceeds area associated with said element.
9. The apparatus of claim 1 , wherein:
said resistive links are effectuated between nearest-neighbor elements of said array thereby effecting diffusive coupling between at least neighboring elements of said array; and
said diffusive coupling configured to increase response, of at least a portion, of said neighboring elements to said input.
10. The apparatus of claim 9 , wherein at least a portion of said resistive links is characterized by a common first resistance value.
11. The apparatus of claim 10 , wherein at least one other portion of said resistive links is characterized by common second resistance value.
12. The apparatus of claim 9 , wherein said input comprises visual image and said sensory processing comprise processing of said image.
13. The apparatus of claim 9 , wherein
said input comprises a digitized image comprising plurality of pixel values and said apparatus is configured to process of said image; and
said processing of said image is capable of providing an indication based on a detection of an object in said image, said indication useful in implementing avoidance logic associated with object.
14. The apparatus of claim 13 , wherein:
said processing comprises object detection characterized by an indication generated, based at least in part, representation of said object being present in said image; and
said indication is capable of being provided to a control interface of a robotic device, said interface configured to effectuate one or more actions configured to instruct said device to avoid said object.
15. 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.
16. The apparatus of claim 15 , wherein:
said means for interconnecting are effectuated between nearest-neighbor elements of said array thereby effecting diffusive coupling between at least neighboring elements of said means for sensing; and
said diffusive coupling configured to increase response, of at least a portion, of said neighboring elements to said input.
17. The apparatus of claim 16 , wherein at least a portion of said means for interconnecting is characterized by a common first resistance value.
18. The apparatus of claim 17 , wherein at least one other portion of said means for interconnecting is characterized by common second resistance value.
19. The apparatus of claim 16 , wherein said input comprises visual image and said sensory processing comprise processing of said image.
20. The apparatus of claim 16 , wherein
said input comprises a digitized image comprising plurality of pixel values and said apparatus is configured to process of said image; and
said processing of said image is capable of providing an indication based on a detection of an object in said image, said indication useful in implementing avoidance logic associated with object.
21. The apparatus of claim 20 , wherein:
said processing comprises object detection characterized by an indication generated, based at least in part, representation of said object being present in said image; and
said indication is capable of being provided to a control interface of a robotic device, said interface configured to effectuate one or more actions configured to instruct said device to avoid said object.