The accessibility of spatial channels for stereo and motion
Authors: Hess, R.F., Wang, Y.Z. and Liu, C.H.
Journal: Vision Research
Volume: 46
Issue: 8-9
Pages: 1318-1326
ISSN: 0042-6989
DOI: 10.1016/j.visres.2005.10.029
Abstract:Using fractal noise images, we measured the dependence of Dmin on the spatial passband (spatial frequency and orientation) over which information was correlated either between the eyes for stereo or between sequential frames for motion. Without affecting the amplitude spectrum of the noise stimulus we used idealized filters to scramble the phase of components outside a pre-defined passband. Using a simple Gaussian model in which performance depends on the signal/noise within a restricted spatial region, we obtained estimates of the bandwidth of the narrowest underlying spatial frequency and orientation spectral region subserving these two comparable tasks. Spatial bandwidths varied with peak spatial frequency but were very broad approximating the spectrum of the stimulus itself. Orientation properties of the underlying mechanisms were isotropic. These results suggest that the independent activity of individual narrowband spatial channels is not perceptually accessible for these tasks.
Source: Scopus
The accessibility of spatial channels for stereo and motion.
Authors: Hess, R.F., Wang, Y.-Z. and Liu, C.H.
Journal: Vision Res
Volume: 46
Issue: 8-9
Pages: 1318-1326
ISSN: 0042-6989
DOI: 10.1016/j.visres.2005.10.029
Abstract:Using fractal noise images, we measured the dependence of D(min) on the spatial passband (spatial frequency and orientation) over which information was correlated either between the eyes for stereo or between sequential frames for motion. Without affecting the amplitude spectrum of the noise stimulus we used idealized filters to scramble the phase of components outside a pre-defined passband. Using a simple Gaussian model in which performance depends on the signal/noise within a restricted spatial region, we obtained estimates of the bandwidth of the narrowest underlying spatial frequency and orientation spectral region subserving these two comparable tasks. Spatial bandwidths varied with peak spatial frequency but were very broad approximating the spectrum of the stimulus itself. Orientation properties of the underlying mechanisms were isotropic. These results suggest that the independent activity of individual narrowband spatial channels is not perceptually accessible for these tasks.
Source: PubMed
Preferred by: Changhong Liu
The accessibility of spatial channels for stereo and motion
Authors: Hess, R.F., Wang, Y.Z. and Liu, C.H.
Journal: VISION RESEARCH
Volume: 46
Issue: 8-9
Pages: 1318-1326
ISSN: 0042-6989
DOI: 10.1016/j.visres.2005.10.029
Source: Web of Science (Lite)
The accessibility of spatial channels for stereo and motion.
Authors: Hess, R.F., Wang, Y.-Z. and Liu, C.H.
Journal: Vision research
Volume: 46
Issue: 8-9
Pages: 1318-1326
eISSN: 1878-5646
ISSN: 0042-6989
DOI: 10.1016/j.visres.2005.10.029
Abstract:Using fractal noise images, we measured the dependence of D(min) on the spatial passband (spatial frequency and orientation) over which information was correlated either between the eyes for stereo or between sequential frames for motion. Without affecting the amplitude spectrum of the noise stimulus we used idealized filters to scramble the phase of components outside a pre-defined passband. Using a simple Gaussian model in which performance depends on the signal/noise within a restricted spatial region, we obtained estimates of the bandwidth of the narrowest underlying spatial frequency and orientation spectral region subserving these two comparable tasks. Spatial bandwidths varied with peak spatial frequency but were very broad approximating the spectrum of the stimulus itself. Orientation properties of the underlying mechanisms were isotropic. These results suggest that the independent activity of individual narrowband spatial channels is not perceptually accessible for these tasks.
Source: Europe PubMed Central