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

Absolute distance perception during in-depth head movement: calibrating optic flow with extra-retinal information.

Chin-Hwee Peh1, Francesco Panerai, Jacques Droulez

  • 1Department of Electrical and Computer Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore. elepehch@nus.edu.sg

Vision Research
|August 6, 2002
PubMed
Summary

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

Carbon Fiber Oxidation in 4D.

Advanced materials (Deerfield Beach, Fla.)·2025
Same author

The logarithmic memristor-based Bayesian machine.

Communications engineering·2025
Same author

3D Rigid Motion Segmentation with Mixed and Unknown Number of Models.

IEEE transactions on pattern analysis and machine intelligence·2019
Same author

Simultaneous Clustering and Model Selection: Algorithm, Theory and Applications.

IEEE transactions on pattern analysis and machine intelligence·2017
Same author

Bayesian processing of vestibular information.

Biological cybernetics·2016
Same author

How the Learning Path and the Very Structure of a Multifloored Environment Influence Human Spatial Memory.

Advances in cognitive psychology·2016

Human observers accurately estimate absolute distance with optic flow during constant head motion. Performance declines with changing motion amplitude, especially for object motion, highlighting the role of non-visual cues in self-motion perception.

Area of Science:

  • Human visual perception
  • Depth perception
  • Motion perception

Background:

  • Scaling absolute distance is crucial for navigation and interaction.
  • Optic flow provides vital information for estimating egocentric and exocentric distances.
  • The role of head motion in distance scaling under varying optic flow conditions requires further investigation.

Purpose of the Study:

  • To investigate human ability to scale absolute distance using monocular optic flow during sagittal head motion.
  • To compare distance perception under self-motion (SM) versus object-motion (OM) conditions.
  • To determine the influence of constant versus variable head movement amplitude on distance judgment.

Main Methods:

  • Participants observed computer-generated spheres with optic flow at various distances.

Related Experiment Videos

  • Monocular vision was employed, focusing on optic flow information.
  • Two conditions were compared: self-motion (SM) and object-motion (OM) with equivalent optic flow fields.

    • Main Results:

    • Accurate absolute distance estimation was observed in both SM and OM conditions with constant head movement amplitude.
    • Performance significantly deteriorated in the OM condition when head movement amplitude varied trial-to-trial.
    • Distance judgment in OM correlated with optic flow divergence; non-visual cues were important for SM.

    Conclusions:

    • Absolute distance scaling is robust to optic flow variations during constant sagittal head motion.
    • Variable head motion amplitude impairs distance judgment primarily in object-motion scenarios.
    • Non-visual cues are critical for accurate distance scaling during self-motion, and sagittal head movements are more effective than lateral translations for scaling absolute distance.