Spatial Frequency Masking and Visibility.
Abstract
In the past year, work has progressed in four interrelated areas. (1) Substantial, evidence supports the hypothesis that visual detection in the presence of masking noise occurs at a constant signal/noise ratio only if the subject is unfamiliar with the mask. (2) The computerized model of visual masking now incorporates enhancement by sub-threshold masks and spatial frequency tuning, in addition to (1), above. (3) Spatial adaptation studies provide a better estimate of channel bandwidth than was previously available. This appears, however, to represent an altogether different mechanism from that involved in masking. (4) Attempts to confirm studies showing the existence of two separate visual systems for the processing of spatial and temporal information have failed even to replicate published effects. The reason for this is still under investigation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 15, 1982
- Accession Number
- ADA112436
Entities
People
- Robert A. Smith
Organizations
- University of New Hampshire