An Analog VLSI System for Stereoscopic Vision

Softcover Nachdruck of the original 1. Auflage 1994
ISBN: 978-1-4613-6174-9
Verlag: Springer US

Buch, Englisch, Band 265, 215 Seiten, Paperback, Format (B × H): 155 mm x 235 mm, Gewicht: 365 g

Reihe: The Springer International Series in Engineering and Computer Science

investigates the interaction of the physical medium and the computation in both biological and analog VLSI systems by synthesizing a functional neuromorphic system in silicon.
In both the synthesis and analysis of the system, a point of view from within the system is adopted rather than that of an omniscient designer drawing a blueprint. This perspective projects the design and the designer into a living landscape. The motivation for a machine-centered perspective is explained in the first chapter. The second chapter describes the evolution of the silicon retina. The retina accurately encodes visual information over orders of magnitude of ambient illumination, using mismatched components that are calibrated as part of the encoding process. The visual abstraction created by the retina is suitable for transmission through a limited bandwidth channel. The third chapter introduces a general method for interchip communication, the address-event representation, which is used for transmission of retinal data. The address-event representation takes advantage of the speed of CMOS relative to biological neurons to preserve the information of biological action potentials using digital circuitry in place of axons. The fourth chapter describes a collective circuit that computes stereodisparity. In this circuit, the processing that corrects for imperfections in the hardware compensates for inherent ambiguity in the environment. The fifth chapter demonstrates a primitive working stereovision system.
contributes to both computer engineering and neuroscience at a concrete level. Through the construction of a working analog of biological vision subsystems, new circuits for building brain-style analog computers have been developed. Specific neuropysiological and psychophysical results in terms of underlying electronic mechanisms are explained. These examples demonstrate the utility of using biological principles for building brain-style computers and the significance of building brain-style computers for understanding the nervous system.

Zielgruppe

Research

Autoren/Hrsg.

Mahowald, Misha

Fachgebiete

• Technische Wissenschaften Energietechnik | Elektrotechnik Elektrotechnik
• Technische Wissenschaften Elektronik | Nachrichtentechnik Elektronik Bauelemente, Schaltkreise
• Interdisziplinäres Wissenschaften Wissenschaften: Forschung und Information Kybernetik, Systemtheorie, Komplexe Systeme
• Naturwissenschaften Physik Physik Allgemein Theoretische Physik, Mathematische Physik, Computerphysik
• Interdisziplinäres Wissenschaften Wissenschaften Interdisziplinär Neurowissenschaften, Kognitionswissenschaft
• Mathematik | Informatik EDV | Informatik Informatik Bildsignalverarbeitung

Inhaltsverzeichnis

1 Synthesis.- 2 The Silicon Retina.- 2.1 Anatomical Models.- 2.2 Architecture of the Silicon Retina.- 2.3 Photoreceptors.- 2.4 Horizontal Cells.- 2.5 Bipolar Cells.- 2.6 Physical Constraints on Information Processing.- 2.7 Emergent Properties.- 3 The Silicon Optic Nerve.- 3.1 Summary of Existing Techniques.- 3.2 Address-Event Representation.- 3.3 Model of Data-Transfer Timing Efficiency.- 3.4 Data Transfer in One Dimension.- 3.5 Two-Dimensional Retina-Receiver System.- 3.6 Advantages of Address Events.- 4 Stereopsis.- 4.1 Stereocorrespondence.- 4.2 Neurophysiology.- 4.3 Stereocorrespondence Algorithms.- 4.4 Stereocorrespondence Chip.- 4.5 Experiments.- 4.6 Stereocorrespondence as a Model of Cortical Function.- 5 System.- A Simple Circuits.- A.1 Transistors.- A.2 Current Mirrors.- A.3 Differential Pairs.- A.4 Transconductance Amplifiers.- A.5 Low-Pass Filter.- A.6 Resistor.