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

Contrast discrimination with pulse trains in pink noise

Not Accessible

Your library or personal account may give you access

Abstract

Detection performance was measured with sinusoidal and pulse-train gratings. Although the 2.09-cycles-per-degree pulse-train, or line, grating contained at least eight harmonics all at equal contrast, it was no more detectable than its most detectable component. The addition of broadband pink noise designed to equalize the detectability of the components of the pulse train made the pulse train approximately a factor of 4 more detectable than any of its components. However, in contrast-discrimination experiments, with a pedestal or masking grating of the same form and phase as the signal and with 15% contrast, the noise did not affect the discrimination performance of the pulse train relative to that obtained with its sinusoidal components. We discuss the implications of these observations for models of early vision, in particular the implications for possible sources of internal noise.

© 2002 Optical Society of America

Full Article  |  PDF Article
More Like This
Contrast discrimination with sinusoidal gratings of different spatial frequency

C. M. Bird, G. B. Henning, and F. A. Wichmann
J. Opt. Soc. Am. A 19(7) 1267-1273 (2002)

Contrast discrimination in noise

Gordon E. Legge, Daniel Kersten, and Arthur E. Burgess
J. Opt. Soc. Am. A 4(2) 391-404 (1987)

Motion thresholds can be predicted from contrast discrimination

Bettina L. Beard, Stanley A. Klein, and Thom Carney
J. Opt. Soc. Am. A 14(9) 2449-2470 (1997)

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 (7)

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 (3)

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