Segregation of mesh-derived textures evaluated by resistance to added disorder.
In the "figure detection task" the strength of segregation for a particular texture pair was estimated by the threshold amount of added disorder that prevented segregation of a textured figure from a textured ground. Disorder was either jitter in the orientation of the texture elements, or jitter in their xy positions, or a mixture of the two. Other procedures included lowpass filtering, and a task requiring discrimination between textured figures of different shapes. Orientation cues are weakly or inconsistently used for segregating mesh textures. The low spatial harmonics are very important. A new finding is that orientation and position jitter thresholds for a set of figure/ground texture patterns are often proportional. In a mixture the one disorder can be exchanged for the other.
Hallett
P E
PE
Department of Physiology, University of Toronto, Ontario, Canada.
D004192:Discrimination, Psychological / Q000502:physiology; D006801:Humans; D010364:Pattern Recognition, Visual / Q000502:physiology*; D011594:Psychometrics; D012399:Rotation; D012684:Sensory Thresholds / Q000502:physiology