Model of visual contrast gain control and pattern masking
- 1 September 1997
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America A
- Vol. 14 (9), 2379-2391
- https://doi.org/10.1364/josaa.14.002379
Abstract
We have implemented a model of contrast gain control in human vision that incorporates a number of key features, including a contrast sensitivity function, multiple oriented bandpass channels, accelerating nonlinearities, and a divisive 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 [P. C. Teo and D. J. Heeger, “Perceptual image distortion,” in Human Vision, Visual Processing, and Digital Display V, B. E. Rogowitz and J. P. Allebach, eds., Proc. SPIE 2179, 127 (1994)].Keywords
This publication has 14 references indexed in Scilit:
- Human luminance pattern-vision mechanisms: masking experiments require a new modelJournal of the Optical Society of America A, 1994
- Spatial frequency adaptation and contrast gain controlVision Research, 1993
- Half-squaring in responses of cat striate cellsVisual Neuroscience, 1992
- Cortical neurons: Isolation of contrast gain controlVision Research, 1992
- Normalization of cell responses in cat striate cortexVisual Neuroscience, 1992
- Organization of suppression in receptive fields of neurons in cat visual cortexJournal of Neurophysiology, 1992
- A transducer model for contrast perceptioVision Research, 1991
- The cortex transform: Rapid computation of simulated neural imagesComputer Vision, Graphics, and Image Processing, 1987
- Contrast masking in human visionJournal of the Optical Society of America, 1980
- Grating contrast: Discrimination may be better than detectionVision Research, 1974