Orientation variance as a quantifier of structure in texture.
- Environmental ScienceSpatial vision
The data suggest that simple orientation statistics could drive a range of 'texture tasks', although the dependency of noise resistance on the pattern type (rotation, translation, etc.) remains to be accounted for.
Feature-based integration of orientation signals in visual search
- PsychologyVision Research
How are local orientation signals pooled?
- Computer ScienceAttention, perception & psychophysics
Pooling of orientation information is a relatively inaccurate process for which different perceptual cues and their combination rules can be used, and parameterized the averaging process for the power parameter of the generalized mean formula.
Information limit on the spatial integration of local orientation signals.
- GeologyJournal of the Optical Society of America. A, Optics, image science, and vision
Results indicate that internal noise shows a primary dependence on texture density but that, counterintuitively, subjects rely on a sample size approximately equal to a fixed power of the number of samples present, regardless of their spatial arrangement.
The role of co-circularity of local elements in texture perception.
- MathematicsJournal of vision
The results suggest that in addition to orientation difference, co-circularity plays a critical role in the perception of orientation-based textural structure, and higher sensitivity for textures made from orientation pairs with either large or small orientation differences is found.
A two-stage model of orientation integration for Battenberg-modulated micro-patterns
A novel stimulus is used to investigate how signals are combined to improve estimates of global orientation and is described by a model that filters the stimulus at the potential target orientations and then combines the signals over space in two stages.
Direct encoding of orientation variance in the visual system.
- Psychology, BiologyJournal of vision
The present study shows that selective adaptation to low or high levels of variance results in a perceptual aftereffect that shifts the perceived level of variance of a subsequently viewed texture in the direction away from that of the adapting stimulus, suggesting that orientation variance is encoded directly by the visual system and possibly at an early cortical stage.
Integration of first- and second-order orientation.
- PsychologyJournal of the Optical Society of America. A, Optics, image science, and vision
The problem of how visual information such as orientation is combined across space bears on key visual abiities, such as texture perception, by measuring orientation discrimination thresholds for arrays of equivisible first-order and second-order Gabors.
Discriminating Global Orientation of Two Element Sets
- ChemistryJournal of cognition
Interactions between two interspersed element sets with explicit orientations are investigated, where element sets interact, where the contribution of one set, presented at a fixed rotation and fixed proportion, varies with the change to the second set.
Relating spatial and temporal orientation pooling to population decoding solutions in human vision
- Computer ScienceVision Research
SHOWING 1-10 OF 36 REFERENCES
Orientation discrimination as a function of orientation and spatial frequency
- PhysicsPerception & psychophysics
Orientation discrimination was measured with a yes-no signal detection procedure at two reference orientations, 90° and 45°, and showed a highly significant reference orientation factor, with smaller just noticeable differences at 90° than at 45° (theoblique effect).
The detection of structure in glass patterns: Psychophysics and computational models
- GeologyVision Research
Discrimination of orientation-defined texture edges
- GeologyVision Research
Acuity for orientation measured with a sequential recognition task and signal detection methods
- PsychologyPerception & psychophysics
An orientation recognition task with two stimuli was employed as the basis of a psychophysical method for measuring sensitivity to orientation and in both subjects employed, sensitivity was greater for horizontal and vertical orientations than for other slopes.
Sensitivity to orientation modulation in micropattern-based textures
- BiologyVision Research
Orientation bandwidths of spatial mechanisms measured by masking.
- PhysicsJournal of the Optical Society of America. A, Optics and image science
By using a model that corrects for the nonlinearity inherent in the masking process, the half-amplitude half-bandwidths of Cartesian-separable receptive fields that may underlie orientation selectivity are obtained and are shown to be consistent with subthreshold summation data as well as physiological data from monkey striate cortex.