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• W2021920009 startingPage "18" @default.
• W2021920009 abstract "Most living things and many nonliving things deform as they move, requiring observers to separate object motions from object deformations. When the object is partially occluded, the task becomes more difficult because it is not possible to use two-dimensional (2-D) contour correlations (Cohen, Jain, & Zaidi, 2010). That leaves dynamic depth matching across the unoccluded views as the main possibility. We examined the role of stereo cues in extracting motion of partially occluded and deforming three-dimensional (3-D) objects, simulated by disk-shaped random-dot stereograms set at randomly assigned depths and placed uniformly around a circle. The stereo-disparities of the disks were temporally oscillated to simulate clockwise or counterclockwise rotation of the global shape. To dynamically deform the global shape, random disparity perturbation was added to each disk's depth on each stimulus frame. At low perturbation, observers reported rotation directions consistent with the global shape, even against local motion cues, but performance deteriorated at high perturbation. Using 3-D global shape correlations, we formulated an optimal Bayesian discriminator for rotation direction. Based on rotation discrimination thresholds, human observers were 75% as efficient as the optimal model, demonstrating that global shapes derived from stereo cues facilitate inferences of object motions. To complement reports of stereo and motion integration in extrastriate cortex, our results suggest the possibilities that disparity selectivity and feature tracking are linked, or that global motion selective neurons can be driven purely from disparity cues." @default.
• W2021920009 created "2016-06-24" @default.
• W2021920009 creator A5000853376 @default.
• W2021920009 creator A5057757139 @default.
• W2021920009 date "2013-01-16" @default.
• W2021920009 modified "2023-09-23" @default.
• W2021920009 title "Efficiency of extracting stereo-driven object motions" @default.
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• W2021920009 doi "https://doi.org/10.1167/13.1.18" @default.
• W2021920009 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3571089" @default.
• W2021920009 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23325345" @default.
• W2021920009 hasPublicationYear "2013" @default.
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