Research output: Contribution to Journal/Magazine › Journal article › peer-review
Perception of suprathreshold naturalistic changes in colored natural images. / To, Michelle P S; Lovell, P. George; Troscianko, Tom et al.
In: Journal of Vision, Vol. 10, No. 4, 2010, p. 12.1-22.Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Perception of suprathreshold naturalistic changes in colored natural images
AU - To, Michelle P S
AU - Lovell, P. George
AU - Troscianko, Tom
AU - Tolhurst, David J
PY - 2010
Y1 - 2010
N2 - Simple everyday tasks, such as visual search, require a visual system that is sensitive to differences. Here we report how observers perceive changes in natural image stimuli, and what happens if objects change color, position, or identity-i.e., when the external scene changes in a naturalistic manner. We investigated whether a V1-based difference-prediction model can predict the magnitude ratings given by observers to suprathreshold differences in numerous pairs of natural images. The model incorporated contrast normalization and surround suppression, and elongated receptive-fields. Observers' ratings were better predicted when the model included phase invariance, and even more so when the stimuli were inverted and negated to lessen their semantic impact. Some feature changes were better predicted than others: the model systematically underpredicted observers' perception of the magnitude of blur, but over-predicted their ability to report changes in textures.
AB - Simple everyday tasks, such as visual search, require a visual system that is sensitive to differences. Here we report how observers perceive changes in natural image stimuli, and what happens if objects change color, position, or identity-i.e., when the external scene changes in a naturalistic manner. We investigated whether a V1-based difference-prediction model can predict the magnitude ratings given by observers to suprathreshold differences in numerous pairs of natural images. The model incorporated contrast normalization and surround suppression, and elongated receptive-fields. Observers' ratings were better predicted when the model included phase invariance, and even more so when the stimuli were inverted and negated to lessen their semantic impact. Some feature changes were better predicted than others: the model systematically underpredicted observers' perception of the magnitude of blur, but over-predicted their ability to report changes in textures.
KW - Photic Stimulation
KW - Form Perception
KW - Contrast Sensitivity
KW - Humans
KW - Color Perception
KW - Nonlinear Dynamics
KW - Predictive Value of Tests
KW - Models, Neurological
KW - Psychophysics
KW - Visual Fields
KW - Sensory Thresholds
KW - Motion Perception
UR - http://www.scopus.com/inward/record.url?scp=77956403910&partnerID=8YFLogxK
U2 - 10.1167/10.4.12
DO - 10.1167/10.4.12
M3 - Journal article
C2 - 20465332
VL - 10
SP - 12.1-22
JO - Journal of Vision
JF - Journal of Vision
SN - 1534-7362
IS - 4
ER -