Silicon models of lateral inhibition

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The neurological process known as lateral inhibition (LI) has long been acknowledged as a critical operation in the pre-processing of many types of sensory stimuli. LI has been observed to enhance visual, auditory, and somatosensory images by performing a differential amplification on the sensory pixels from which the image is composed. In this study, LI is characterized in two CMOS VLSI-based sensory arrays with different pixel geometries and inhibitory algorithms. In these arrays, each sensory pixel inhibits, and in turn, is inhibited by each of its immediate neighbors. Test results indicate that both circuits were able to enhance the contrast of arbitrary two-dimensional images, and do so in a manner that is dynamically stable. Achieving this enhancement on sensory images immediately and simultaneously, this operation offers performance at a level not obtainable by software methods. As such, it is well suited for machine vision systems that utilize parallel architectures.

Original languageEnglish (US)
Title of host publication1991 Proceedings of the 34th Midwest Symposium on Circuits and Systems, MWSCAS 1991
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Electronic)0780306201
StatePublished - 1991
Event34th Midwest Symposium on Circuits and Systems, MWSCAS 1991 - Monterey, United States
Duration: May 14 1992May 17 1992

Publication series

NameMidwest Symposium on Circuits and Systems
ISSN (Print)1548-3746


Conference34th Midwest Symposium on Circuits and Systems, MWSCAS 1991
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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