Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Application of a computable model of human spatial vision to phase discrimination

Not Accessible

Your library or personal account may give you access

Abstract

We have used a computable model of human spatial vision to make predictions for phase-discrimination experiments. This model is being developed to deal with a broad range of problems in vision and was not specifically formulated to deal with phase discrimination. In the model, cross correlation of the stimuli with an array of sensors produces feature vectors that are operated on by a position-uncertain ideal observer to simulate detection and discrimination experiments. In this report the stimuli are compound sinusoidal gratings composed of a fundamental and a higher-frequency component added in various phases. We compare model predictions with three key results from the literature: (1) the effect of the contrast of the fundamental on phase discrimination, (2) threshold phase difference as a function of the fundamental frequency, and (3) the contrast required for phase discrimination as a function of the frequency ratio of the two grating components. In the first two cases, the predictions capture the main features of the data, although quantitative discrepancies remain. In the third case, the model fails, and this failure suggests additional restrictions on the combination of information across sensors.

© 1985 Optical Society of America

Full Article  |  PDF Article
More Like This
Ideal discriminators in spatial vision:two-point stimuli

Wilson S. Geisler and Karen D. Davila
J. Opt. Soc. Am. A 2(9) 1483-1497 (1985)

Equivalent-noise model for contrast detection and discrimination

A. J. Ahumada and A. B. Watson
J. Opt. Soc. Am. A 2(7) 1133-1139 (1985)

Capabilities of monkey cortical cells in spatial-resolution tasks

Andrew Parker and Mike Hawken
J. Opt. Soc. Am. A 2(7) 1101-1114 (1985)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (10)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved