Predictive Models of Human Visual Processes in Aerosystems.
Abstract
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 min. of arc and with the same precision, control the movement of visual targets relative to an observer's 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, that 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. The population response profile proved an accurate predictor of visual sensitivity for foveal targets.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1979
- Accession Number
- ADA092290
Entities
People
- Richard J. W. Mansfield
Organizations
- Harvard University