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

Seeing blur: 'motion sharpening' without motion.

Mark A Georgeson1, Stephen T Hammett

  • 1School of Psychology, University of Birmingham, UK. m.a.georgeson@aston.ac.uk

Proceedings. Biological Sciences
|July 26, 2002
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

The influence of similarity, sensitivity and bias on letter identification.

Vision research·2026
Same author

Detection and identification of monocular, binocular, and dichoptic stimuli are mediated by binocular sum and difference channels.

Journal of vision·2025
Same author

Revealing the influence of bias in a letter acuity identification task: A noisy template model.

Vision research·2023
Same author

Contrast adaptation and interocular transfer in cortical cells: A re-analysis & a two-stage gain-control model of binocular combination.

Vision research·2021
Same author

GABA, noise and gain in human visual cortex.

Neuroscience letters·2020
Same author

Interocular difference thresholds are mediated by binocular differencing, not summing, channels.

Journal of vision·2019
Same journal

Chronic limb loading results in remarkable load carriage economy in growing fowl.

Proceedings. Biological sciences·2026
Same journal

Motion-from-structure in face perception: expectations of natural face motion depend on face shape.

Proceedings. Biological sciences·2026
Same journal

Unification and generalization of models of zygote survival.

Proceedings. Biological sciences·2026
Same journal

Phenological type- and diameter-dependent effects of individual light availability and interannual climate variation on tree growth.

Proceedings. Biological sciences·2026
Same journal

Interaction range of common goods shapes Black Queen dynamics beyond the cheater-cooperator narrative.

Proceedings. Biological sciences·2026
Same journal

Stingray spine diversity reflects performance trade-offs linked to puncture and breakability.

Proceedings. Biological sciences·2026
See all related articles

Fast-moving objects may appear sharper than expected due to "motion sharpening." This study reveals that brief visual presentations also enhance edge sharpness, challenging existing motion blur models and suggesting early visual system nonlinearities.

Area of Science:

  • Visual perception
  • Computational neuroscience
  • Image processing

Background:

  • Conventional wisdom suggests fast motion blurs objects.
  • Previous research identified "motion sharpening" where blurred edges appear sharper during movement.
  • High-level and recent low-level models attempt to explain motion sharpening.

Purpose of the Study:

  • To investigate the phenomenon of "motion sharpening" and its underlying mechanisms.
  • To test the validity of existing computational models of visual perception.
  • To explore the role of stimulus duration and contrast in edge sharpness perception.

Main Methods:

  • Psychophysical experiments presenting visual stimuli (gratings) of varying sharpness, duration, and contrast.
  • Comparison of perceived sharpness for briefly presented (transient) versus longer-duration stimuli.

Related Experiment Videos

  • Analysis of sharpening effects across different grating types (sinusoidal and non-sinusoidal).

    • Main Results:

    • Blurred edges were perceived as sharper when presented briefly (8-24 ms) compared to longer durations (100-500 ms), even without motion.
    • Motion sharpening was observed, but the duration-based sharpening occurred independently of motion.
    • Sharpening effects were similar for sinusoidal and non-sinusoidal gratings, and persisted at low contrast levels.

    Conclusions:

    • Findings challenge models based on motion blur compensation and linear filtering.
    • The results suggest that early visual nonlinearities, potentially involving the magnocellular (M-cell) pathway, contribute to sharpening.
    • A "default" assumption of sharpness in visual processing is not supported by this evidence.