NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Model of visual contrast gain control and pattern maskingWe have implemented a model of contrast gain and control in human vision that incorporates a number of key features, including a contrast sensitivity function, multiple oriented bandpass channels, accelerating nonlinearities, and a devisive inhibitory gain control pool. The parameters of this model have been optimized through a fit to the recent data that describe masking of a Gabor function by cosine and Gabor masks [J. M. Foley, "Human luminance pattern mechanisms: masking experiments require a new model," J. Opt. Soc. Am. A 11, 1710 (1994)]. The model achieves a good fit to the data. We also demonstrate how the concept of recruitment may accommodate a variant of this model in which excitatory and inhibitory paths have a common accelerating nonlinearity, but which include multiple channels tuned to different levels of contrast.
Document ID
20040172913
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Watson, A. B.
(NASA Ames Research Center Moffett Field, CA United States)
Solomon, J. A.
Date Acquired
August 22, 2013
Publication Date
September 1, 1997
Publication Information
Publication: Journal of the Optical Society of America. A, Optics and image science
Volume: 14
Issue: 9
ISSN: 0740-3232
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Space Human Factors
NASA Center ARC

Available Downloads

There are no available downloads for this record.
No Preview Available