Abstract

The new generation of silicon retinae has two defining characteristics. First, these synthetic retinae are morphologically equivalent to their biological counterparts---at an appropriate level of abstraction. Second, they accomplish all four major operations performed by biological retinae using neurobiological principles: (1) continuous sensing for detection, (2) local automatic gain control for amplification, (3) spatiotemporal bandpass filtering for preprocessing, and (4) adaptive sampling for quantization. I introduce the term retinomorphic to refer to this subclass of the neuromorphic electronic systems [30]. I compare and contrast their design principles with the standard practice in imager design. I argue that neurobiological principles are best suited to perceptive systems [43] that go beyond reproducing the dynamic scene, like a conventional video camera does, to extracting salient information in real time [3]. I shall present results from a fully operational retinomorphic vis...

Citations

4404	The Mathematical Theory of Communication - Shannon, Weaver - 1963
929	Computer Networks - Tanenbaum - 1981
530	Analog VLSI and Neural Systems - Mead - 1989
142	What does the retina know about natural scenes? Neural Comput - Atick, Redlich - 1992
67	Silicon auditory processors as computer peripherals - Lazzaro, Wawrzynek, et al. - 1993
64	Neuromorphic electronic systems - Mead - 1990
40	A communication scheme for analog VLSI perceptive systems - Mortara, Vittoz, et al. - 1995
39	A silicon neuron - Mahowald, Douglas - 1991
34	Wiring Considerations in Analog VLSI Systems with Application to Field-programmable Networks - Sivilotti - 1991
32	Temporal decorrelation: A theory of lagged and nonlagged responses in the lateral geniculate nucleus - Dong, Atick - 1995
31	Motion and vision. II. Stabilized spatio-temporal threshold surface - Kelly - 1979
30	An Inherently Linear and Compact MOST-only Current Division Technique - Bult, Geelen - 1992
30	Analog VLSI signal processing: Why, where and how - Vittoz - 1994
27	Translinear circuits: A proposed classification - Gilbert - 1975
23	Adaptive retina - Mead - 1989
20	An Analog VLSI Stereoscopic Vision System - Mahowald - 1994
19	Linear networks based on transistors - Vittoz, Arreguit - 1993
18	A cmos area image sensor with pixel-level a/d conversion - BFowler, Yang
18	Scaling of MOS technology to submicrometer feature sizes - MEAD - 1994
16	Boahen, “Translinear circuits in subthreshold mos,” Analog Integr - Andreou, A - 1996
15	Matching coding, circuits, cells, and molecules to signals: General principles of retinal design in the �y’s eye - Laughlin - 1994
15	Temporal adaptation in a silicon auditory nerve - Lazzaro
14	Spatio-temporal interactions in cat retinal ganglion cells showing linear spatial summation - Enroth-Cugell, Robson, et al. - 1983
13	A sensitive electronic photoreceptor - Mead - 1985
10	A contrast-sensitive retina with reciprocal synapses - Boahen, Andreou - 1991
9	Photoreceptor circuit with a wide dynamic range - Delbrück, Mead - 1996
8	Boahen, “A 48,000 pixel, 590,000 transistor silicon retina in current-mode subthreshold - Andreou, A - 1994
6	Simulation of an anatomically defined local circuit - The cone-horizontal cell network in cat retina - Smith - 1995
6	Hateren, “A theory of maximizing sensory information - van - 1992
5	Fundamental limitations in microelectronics-i: Mos technology - Hoeneisen, Mead - 1972
4	Low power analog VLSI systems for sensory information processing - Andreou - 1995
4	Spatiotemporal sensitivity of the retina: A physical model - Boahen
4	and A W Freeman. A model for spatiotemporal frequency responses in the x cell pathway of cat's retina - Chen - 1989
4	Computational studies on the interaction between red cone and H1 horizontal cell - Oshima, Yagi, et al. - 1995
3	The adaptive neuron and the diodecapacitor integrator - Boahen
3	Toward a second generation silicon retina - Boahen - 1990
3	Illuminationinvariant face recognition with a contrast sensitive silicon retina - Buhman, Lades, et al. - 1994
3	Standard cmos active pixel image sensors for multimedia applications - Dickinson, Ackland, et al. - 1995
3	A small pixel CMD image sensor - Ogata, Nakamura, et al. - 1990
3	A lightness scale for image intensity - Richards - 1982
2	Statistics of natural time-varying scenes - Dong, Atick - 1995
1	A 1/3 inch 630k-pixel it-ccd image sensor with multi-function capability - Fujikawa, Hirota, et al. - 1995
1	Wireless focal planes: On the road to amacronic sensors - Veldkamp - 1993