Accession Number:

ADA071948

Title:

Predictive Models of Human Visual Processes in Aerosystems.

Descriptive Note:

Annual rept. 1 Jun 77-30 Sep 78,

Corporate Author:

HARVARD UNIV CAMBRIDGE MA DEPT OF PSYCHOLOGY

Personal Author(s):

Report Date:

1978-10-01

Pagination or Media Count:

42.0

Abstract:

Over the past year a special eye-movement monitoring and visual display system has been used to investigate human acuity using computer-controlled psychophysical testing procedures. The system can accurately measure eye-movements of less than 1 of arc and with the same precision, control the movement of visual targets relative to an observers retina. The theoretical reconstruction of the response profile of a visual target is complicated by the fact that under ordinary viewing conditions, even during fixation, the population of active elements in the visual pathway changes constantly. Using the special visual apparatus, it was possible to maintain a target on a fixed set of retinal receptors facilitating an orderly experimental analysis of visual response patterns. The problem of how the human visual system detects oriented targets was examined using a mathematical model whose basic elements are spatial filters representing the receptive field response profiles of visual cortical neurons in the supragranular layers of Area 17.

Subject Categories:

  • Psychology
  • Anatomy and Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE