A comparison of global motion perception using a multiple-aperture stimulus

Lap Fai, Alan LEE, Hongjing LU

Research output: Journal PublicationsJournal Article (refereed)Researchpeer-review

20 Citations (Scopus)

Abstract

The human visual system integrates local motion signals to generate globally coherent motion percepts. However, it is unclear whether the perception of different types of global motion relies on a common motion integration mechanism. Using the multiple-aperture stimulus developed by K. Amano, M. Edwards, D. R. Badcock, and S. Nishida (2009), we compared the motion sensitivity (in terms of coherence threshold) for translational, circular, and radial motion. We found greater motion sensitivity for the two complex (circular and radial) motion types than for translational motion, implying that specific motion integration mechanisms are involved in the computation for different motion types. Our results reveal a "complexity advantage" in perceiving motion, which is consistent with physiological and computational evidence suggesting that specific mechanisms exist for processing complex circular/radial motion. We further examined the contributions of several critical factors that influence human global motion sensitivity. We found that human sensitivity for all motion types remained constant across a range of motion sampling density but varied depending on global speed. The minimum stimulus duration required for observers to reach constant sensitivity was found to be short ( approximately 140 ms) for all motion types.
Original languageEnglish
Pages (from-to)1-16
Number of pages16
JournalJournal of Vision
Volume10
Issue number4
DOIs
Publication statusPublished - 1 Apr 2010
Externally publishedYes

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title = "A comparison of global motion perception using a multiple-aperture stimulus",
abstract = "The human visual system integrates local motion signals to generate globally coherent motion percepts. However, it is unclear whether the perception of different types of global motion relies on a common motion integration mechanism. Using the multiple-aperture stimulus developed by K. Amano, M. Edwards, D. R. Badcock, and S. Nishida (2009), we compared the motion sensitivity (in terms of coherence threshold) for translational, circular, and radial motion. We found greater motion sensitivity for the two complex (circular and radial) motion types than for translational motion, implying that specific motion integration mechanisms are involved in the computation for different motion types. Our results reveal a {"}complexity advantage{"} in perceiving motion, which is consistent with physiological and computational evidence suggesting that specific mechanisms exist for processing complex circular/radial motion. We further examined the contributions of several critical factors that influence human global motion sensitivity. We found that human sensitivity for all motion types remained constant across a range of motion sampling density but varied depending on global speed. The minimum stimulus duration required for observers to reach constant sensitivity was found to be short ( approximately 140 ms) for all motion types.",
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A comparison of global motion perception using a multiple-aperture stimulus. / LEE, Lap Fai, Alan; LU, Hongjing.

In: Journal of Vision, Vol. 10, No. 4, 01.04.2010, p. 1-16.

Research output: Journal PublicationsJournal Article (refereed)Researchpeer-review

TY - JOUR

T1 - A comparison of global motion perception using a multiple-aperture stimulus

AU - LEE, Lap Fai, Alan

AU - LU, Hongjing

PY - 2010/4/1

Y1 - 2010/4/1

N2 - The human visual system integrates local motion signals to generate globally coherent motion percepts. However, it is unclear whether the perception of different types of global motion relies on a common motion integration mechanism. Using the multiple-aperture stimulus developed by K. Amano, M. Edwards, D. R. Badcock, and S. Nishida (2009), we compared the motion sensitivity (in terms of coherence threshold) for translational, circular, and radial motion. We found greater motion sensitivity for the two complex (circular and radial) motion types than for translational motion, implying that specific motion integration mechanisms are involved in the computation for different motion types. Our results reveal a "complexity advantage" in perceiving motion, which is consistent with physiological and computational evidence suggesting that specific mechanisms exist for processing complex circular/radial motion. We further examined the contributions of several critical factors that influence human global motion sensitivity. We found that human sensitivity for all motion types remained constant across a range of motion sampling density but varied depending on global speed. The minimum stimulus duration required for observers to reach constant sensitivity was found to be short ( approximately 140 ms) for all motion types.

AB - The human visual system integrates local motion signals to generate globally coherent motion percepts. However, it is unclear whether the perception of different types of global motion relies on a common motion integration mechanism. Using the multiple-aperture stimulus developed by K. Amano, M. Edwards, D. R. Badcock, and S. Nishida (2009), we compared the motion sensitivity (in terms of coherence threshold) for translational, circular, and radial motion. We found greater motion sensitivity for the two complex (circular and radial) motion types than for translational motion, implying that specific motion integration mechanisms are involved in the computation for different motion types. Our results reveal a "complexity advantage" in perceiving motion, which is consistent with physiological and computational evidence suggesting that specific mechanisms exist for processing complex circular/radial motion. We further examined the contributions of several critical factors that influence human global motion sensitivity. We found that human sensitivity for all motion types remained constant across a range of motion sampling density but varied depending on global speed. The minimum stimulus duration required for observers to reach constant sensitivity was found to be short ( approximately 140 ms) for all motion types.

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