Apparent speed of type I symmetrical plaids
E Castet, MJ Morgan - Vision research, 1996 - Elsevier
The apparent speed of plaids made up of two gratings having the same spatial frequency
and the same speed was evaluated (symmetrical type 1). The plaids were moving vertically …
and the same speed was evaluated (symmetrical type 1). The plaids were moving vertically …
[HTML][HTML] Evidence for a feature tracking explanation of why type II plaids move in the vector sum direction at short durations
L Bowns - Vision research, 1996 - Elsevier
When two moving sinusoidal gratings, with similar spatial frequency, contrast, phase, but
different orientation are combined to form a plaid, their perceived direction of motion has …
different orientation are combined to form a plaid, their perceived direction of motion has …
Two-stage analysis of the motion of 2-dimensional patterns, what is the first stage?
AM Derrington, DR Badcock - Vision research, 1992 - Elsevier
The sum of two differently orientated moving sinusoidal gratings of similar spatial frequency,
contrast, and velocity appears as a single coherent “plaid” pattern. The visual system is …
contrast, and velocity appears as a single coherent “plaid” pattern. The visual system is …
Changes in the perceived direction of drifting plaids, induced by asymmetrical changes in the spatio-temporal structure of the underlying components
DW Heeley, HM Buchanan-Smith - Vision Research, 1994 - Elsevier
When a plaid pattern with symmetrical velocity components (Type I) is changed to a plaid
pattern with asymmetrical velocity components (Type IA), the overall direction of drift …
pattern with asymmetrical velocity components (Type IA), the overall direction of drift …
The perceived motion direction of fast-moving Type-II plaids
D Liu, G Sperling - Journal of Vision, 2008 - jov.arvojournals.org
A plaid motion stimulus consists of two superimposed sinewave gratings moving in
independent directions. Every plaid has a rigid interpretation as a translating single frame …
independent directions. Every plaid has a rigid interpretation as a translating single frame …
Analysis of the motion of 2-dimensional patterns: Evidence for a second-order process
AM Derrington, DR Badcock, SA Holroyd - Vision Research, 1992 - Elsevier
The sum of two differently orientated moving sinusoidal gratings of similar spatial frequency,
contrast, and velocity appears as a single coherent “plaid” pattern. The visual system is …
contrast, and velocity appears as a single coherent “plaid” pattern. The visual system is …
Perceived speed and direction of complex gratings and plaids
Measurements of perceived speed were obtained for a variety of drifting simple and complex
gratings, and measurements of perceived speed and direction were obtained for plaids. For …
gratings, and measurements of perceived speed and direction were obtained for plaids. For …
On the role of second-order signals in the perceived direction of motion of type II plaid patterns
SJ Cropper, DR Badcock, A Hayes - Vision research, 1994 - Elsevier
Second-order Type I and Type II plaids were constructed by combining two random-dot
gratings. Each component consisted of a dynamic random-dot field, the contrast of which …
gratings. Each component consisted of a dynamic random-dot field, the contrast of which …
Effect of contrast on the perceived direction of a moving plaid
LS Stone, AB Watson, JB Mulligan - Vision research, 1990 - Elsevier
We performed a series of experiments examining the effect of contrast on the perception of
moving plaids. This was done to test the hypothesis put forth by Adelson and Movshon …
moving plaids. This was done to test the hypothesis put forth by Adelson and Movshon …
Motion of complex patterns is computed from the perceived motions of their components
A Derrington, M Suero - Vision Research, 1991 - Elsevier
A plaid pattern made by adding together two gratings of the same spatial frequency, one
moving 45 deg above the horizontal, and the other moving 45 deg below the horizontal …
moving 45 deg above the horizontal, and the other moving 45 deg below the horizontal …