Evidence for a Fifth, Smaller Channel in Early Human Vision.

Abstract

Recent studies in psychophysics and neurophysiology suggest that the human visual system utilizes a range of different size or spatial frequency tuned mechanisms in its processing of visual information. It has been proposed that there exist four such mechanisms, operating everywhere in the visual field, with the smallest mechanism having a central excitatory width of 3 in. of arc in the central fovea. This note argues that there exists indirect evidence for the existence of a fifth, smaller channel, with a central width in the fovea of 1.5 in. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1979
Accession Number
ADA077916

Entities

People

  • D. Marr
  • E. Hildreth
  • T. Poggio

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Artificial Intelligence
  • Cerebral Cortex
  • Change Detection
  • Channel Models
  • Crossings
  • Data Displays
  • Department Of Defense
  • Detection
  • Diameters
  • Filters
  • Filtration
  • Fourier Analysis
  • Frequency
  • Gaussian Distributions
  • Information Systems
  • Military Research
  • Monkeys

Readers

  • Theoretical Analysis.
  • Vision Science/Vision Psychology/Cognitive Neuroscience.