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

Surface characterizations of color thresholds.

A B Poirson1, B A Wandell, D C Varner

  • 1Department of Psychology, Stanford University, California 94305.

Journal of the Optical Society of America. A, Optics and Image Science
|April 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

Repeatability and reciprocity of the cone optoretinogram.

Biomedical optics express·2023
Same author

Probing Computation in the Primate Visual System at Single-Cone Resolution.

Annual review of neuroscience·2019
Same author

Stimulus Dependence of Gamma Oscillations in Human Visual Cortex.

Cerebral cortex (New York, N.Y. : 1991)·2014
Same author

The synthesis and analysis of color images.

IEEE transactions on pattern analysis and machine intelligence·2011
Same author

Image capture: simulation of sensor responses from hyperspectral images.

IEEE transactions on image processing : a publication of the IEEE Signal Processing Society·2008
Same author

Lightness constancy: a direct test of the illumination-estimation hypothesis.

Psychological science·2002

Researchers compared ellipsoids, rectangles, and parallelograms as models for visual detection contours. The ellipsoid and rectangle models fit data as well as measurement variability, suggesting they accurately represent visual mechanisms.

Area of Science:

  • Visual perception
  • Computational neuroscience
  • Psychophysics

Background:

  • Parametric shapes are frequently used to model three-dimensional detection contours in visual science.
  • Understanding the underlying visual detection mechanisms is crucial for advancing visual neuroscience.

Purpose of the Study:

  • To evaluate the efficacy of ellipsoidal, rectangular, and parallelogram shapes as models for three-dimensional visual detection contours.
  • To investigate how the choice of shape model influences inferences about theoretical visual detection mechanisms.

Main Methods:

  • The study employed statistical tests to assess the goodness-of-fit for three parametric shape models (ellipsoid, rectangle, parallelogram) against empirical data.
  • Detection contours were measured using 2-degree test fields with a 1-second Gaussian time course.

Related Experiment Videos

Main Results:

  • Both ellipsoid and rectangle models demonstrated precision comparable to the inherent variability in repeated threshold measurements.
  • The parallelogram model, despite having more parameters, offered a slightly better fit but did not improve interpolation accuracy for novel color directions compared to the ellipsoid model.

Conclusions:

  • The ellipsoid and rectangle models provide robust representations of visual detection contours, aligning with measurement precision.
  • While the parallelogram model offers a marginal fit improvement, the ellipsoidal model remains a more reliable guide for predicting thresholds in new color directions, suggesting limitations in the parallelogram's theoretical implications.