Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Exposure-duration effects in localization judgments.

C A Burbeck

    Journal of the Optical Society of America. A, Optics and Image Science
    |November 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    Measuring perceived 3D shape at multiple spatial scales.

    Vision research·1999
    Same author

    Scaled medial axis representation: evidence from position discrimination task.

    Vision research·1998
    Same author

    Across-object relationships in perceived object orientation.

    Vision research·1997
    Same author

    Occlusion edge blur: a cue to relative visual depth.

    Journal of the Optical Society of America. A, Optics, image science, and vision·1996
    Same author

    Linking object boundaries at scale: a common mechanism for size and shape judgments.

    Vision research·1996
    Same author

    Object representation by cores: identifying and representing primitive spatial regions.

    Vision research·1995
    Same journal

    Phase retrieval with prior information.

    Journal of the Optical Society of America. A, Optics and image science·2008
    Same journal

    Clinical microscopy of the cornea utilizing optical sectioning and a high-numerical-aperture objective.

    Journal of the Optical Society of America. A, Optics and image science·1993
    Same journal

    Eye-tracking laser Doppler velocimeter stabilized in two dimensions: principle, design, and construction.

    Journal of the Optical Society of America. A, Optics and image science·1993
    Same journal

    Effects of aging in retinal image quality.

    Journal of the Optical Society of America. A, Optics and image science·1993
    Same journal

    Axial eye-length measurement by wavelength-shift interferometry.

    Journal of the Optical Society of America. A, Optics and image science·1993
    Same journal

    Fractal analysis of steady-state-flicker visual evoked potentials: feasibility.

    Journal of the Optical Society of America. A, Optics and image science·1993
    See all related articles

    Localization accuracy improves with longer exposure durations for small object separations. However, for larger objects and separations, accuracy plateaus after 100 milliseconds, suggesting a unified underlying mechanism for spatial localization.

    Area of Science:

    • Visual perception
    • Psychophysics
    • Neuroscience

    Background:

    • Hyperacuity studies investigate precise visual judgments.
    • Previous research indicated improved localization accuracy with increased exposure duration up to 400 msec for small object separations.
    • The effect of exposure duration on localization accuracy for larger object separations and broadband stimuli was less understood.

    Purpose of the Study:

    • To investigate the impact of extended exposure durations (beyond 100 msec) on visual localization accuracy across varying object separations.
    • To determine if the benefits of increased exposure duration observed in small-scale hyperacuity extend to large-scale localization tasks.
    • To elucidate the role of spatial-frequency content in modulating the exposure-duration effect on localization.

    Main Methods:

    Related Experiment Videos

    • Systematic manipulation of exposure duration and object separation in a visual localization task.
    • Utilizing spectrally broadband and high-frequency objects to assess the influence of spatial-frequency content.
    • Comparing localization accuracy data across different stimulus scales and spatial-frequency characteristics.

    Main Results:

    • Confirmed that localization accuracy for small object separations (minutes of arc) improves with exposure durations up to 400 msec.
    • Demonstrated that localization accuracy for larger objects at larger separations does not significantly improve beyond 100 msec exposure duration.
    • Showed that substituting high-frequency objects for broadband objects in large-scale localization tasks yielded results similar to small-scale cases regarding exposure-duration effects.

    Conclusions:

    • The exposure-duration effect in visual localization is dependent on spatial-frequency content, particularly at larger scales.
    • These findings suggest that the observed effect is a suprathreshold manifestation of spatiotemporal interactions, akin to contrast-threshold phenomena.
    • A single underlying neural mechanism likely governs both small- and large-scale visual localization processes.