NTRS - NASA Technical Reports Server

Back to Results
Contrast Gain Control Model Fits Masking DataWe studied the fit of a contrast gain control model to data of Foley (JOSA 1994), consisting of thresholds for a Gabor patch masked by gratings of various orientations, or by compounds of two orientations. Our general model includes models of Foley and Teo & Heeger (IEEE 1994). Our specific model used a bank of Gabor filters with octave bandwidths at 8 orientations. Excitatory and inhibitory nonlinearities were power functions with exponents of 2.4 and 2. Inhibitory pooling was broad in orientation, but narrow in spatial frequency and space. Minkowski pooling used an exponent of 4. All of the data for observer KMF were well fit by the model. We have developed a contrast gain control model that fits masking data. Unlike Foley's, our model accepts images as inputs. Unlike Teo & Heeger's, our model did not require multiple channels for different dynamic ranges.
Document ID
Document Type
Preprint (Draft being sent to journal)
Watson, Andrew B. (NASA Ames Research Center Moffett Field, CA United States)
Solomon, Joshua A. (NASA Ames Research Center Moffett Field, CA United States)
Null, Cynthia H.
Date Acquired
August 20, 2013
Publication Date
January 1, 1994
Subject Category
Meeting Information
Association for Research in Vision and Ophthalmology(Fort Lauderdale, FL)
Funding Number(s)
PROJECT: RTOP 199-06-12-31
PROJECT: RTOP 505-64-53
Distribution Limits
Work of the US Gov. Public Use Permitted.