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

Identifying contours from occlusion events.

N Bruno1, M Bertamini

  • 1University of Padua, Italy.

Perception & Psychophysics
|October 1, 1990
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

fMRI responses to horizontal and vertical symmetry axes in ascending visual hierarchy.

NeuroImage·2026
Same author

The burden of calcific aortic stenosis: what's behind?

European review for medical and pharmacological sciences·2023
Same author

Visual similarity modulates visual size contrast.

Acta psychologica·2018
Same author

Pulsed source of spectrally uncorrelated and indistinguishable photons at telecom wavelengths.

Optics express·2014
Same author

High efficiency coupling of photon pairs in practice.

Optics express·2014
Same author

Phase III development of the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire module for women undergoing breast reconstruction.

The British journal of surgery·2014
Same journal

Response organization in selective adaptation to speech sounds.

Perception & psychophysics·2014
Same journal

Reaction times to comparisons within and across phonetic categories.

Perception & psychophysics·2012
Same journal

Auditory and phonetic memory codes in the discrimination of consonants and vowels.

Perception & psychophysics·2012
Same journal

Simple and contingent adaptation effects for place of articulation in stop consonants.

Perception & psychophysics·2012
Same journal

Auditory property detectors and processing place features in stop consonants.

Perception & psychophysics·2012
Same journal

Visual working memory for line orientations and face identities.

Perception & psychophysics·2008
See all related articles

Perception of surface contours from occlusion events is more accurate with translational motion than rotational motion. Background motion trials generally yield easier contour identification than figure-motion trials.

Area of Science:

  • Visual perception
  • Computational neuroscience
  • Cognitive psychology

Background:

  • Occlusion events are crucial for defining surface contours.
  • Previous models of contour perception from occlusion lack comprehensive experimental validation.
  • Understanding factors influencing contour identification is key to visual processing research.

Purpose of the Study:

  • To investigate how motion type (rotation vs. translation), motion context (figure vs. background), density, and velocity affect contour identification from occlusion.
  • To compare the efficacy of translational versus rotational motion in defining surface contours.
  • To evaluate the impact of different display types (line patterns vs. textured surfaces) on contour perception.

Main Methods:

  • Four experiments were conducted, manipulating occlusion event density, velocity, and motion type (rotation/translation).

Related Experiment Videos

  • Both figure-motion and background-motion trials were used to assess contour identification accuracy.
  • Stimuli included line patterns and textured surfaces under various motion conditions.

    • Main Results:

    • Contour identification was more accurate for translational motion compared to rotational motion.
    • Background-motion trials generally resulted in easier contour identification than figure-motion trials.
    • Density affected identification across all conditions, while velocity's impact varied, notably influencing background-motion trials more consistently.

    Conclusions:

    • The findings suggest that translational motion and background-motion scenarios facilitate contour perception from occlusion more effectively.
    • Results challenge existing theories of contour perception, indicating a potential role for ocular pursuit mechanisms.
    • The study highlights the complex interplay of motion characteristics and context in visual contour definition.