Integration, segregation, and binocular combination.
The human visual system can accurately judge the mean of a distribution of different orientation samples. We ask whether the site of this integration is before or after the sites of binocular combination and disparity processing. Furthermore, we are interested in whether the efficiency with which local orientation information is integrated depends on the eye of origin. Our results suggest that orientation integration occurs after binocular integration but before disparity coding. We show that the effectiveness of added orientation noise is not only less than expected on signal or noise grounds but also that it depends on the dominance of the eye to which it is presented, suggesting an interocular opponent interaction in which the dominant eye input has higher gain.
Mansouri
Behzad
B
McGill Vision Research, H4-14 Montreal, H3A 1A1 Quebec, Canada. behzad.mansouri@mail.mcgill.ca
Hess
Robert F
RF
Allen
Harriet A
HA
Dakin
Steven C
SC
D023882:Dominance, Ocular / Q000502:physiology*; D006801:Humans; D008959:Models, Neurological; D010364:Pattern Recognition, Visual / Q000502:physiology*; D015348:Vision, Binocular / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*