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Journal of Vision
Article . 2010 . Peer-reviewed
Data sources: Crossref
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Journal of Vision
Article
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Motion capture is motion integration

Authors: Huk, Alexander C., , '96; Freeman, Jeremy, , '08; Durgin, Frank H.;

Motion capture is motion integration

Abstract

The phenomenon of “motion capture†has been described as a suppression of the motion of high spatial-frequency (SF) elements in favor of the motion of low SF components, allowing larger forms to capture their smaller features when they move (e.g., Ramachandran, 1990). However, recent evidence suggests that motion capture might not reflect active suppression of high SF signals, but instead is simply an instance of weighted combination of high and low SF signals (Durgin, Freeman, Huk, VSS 2005). Here we show that increasing the contrast (and thus the motion energy) of high SF components allows them to “capture†the low SF components, thus arguing against the need for the specialized motion capture mechanism originally posited. We utilized displays in which we independently manipulated the contrast and speeds of two superimposed motion components, consisting of randomly scattered 2D Gaussian elements of two different sizes (low-SF and high-SF). Participants were instructed to judge the speed of either the high-SF or low-SF elements relative to a standard speed (2.5 deg/sec). The irrelevant (unjudged) elements moved either 75%, 100%, or 125% of the standard speed. The contrast of the low-SF elements was always 20%; the contrast of the high-SF elements was either 20% or 80%. We measured the actual speed of the relevant elements necessary to perceptually match the standard speed (for each irrelevant element speed). When nominal contrasts were equal, the low-SF elements exerted larger effects on the perceived speed of the high-SF elements than vice versa. But when the high-SF elements were higher in contrast the relative weights reversed. A generic model of weighted motion integration accounts for both traditional motion capture as well as for the reversed capture of low SF components by high SF elements.

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United States
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Keywords

Psychology

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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