Dynamic noise backgrounds facilitate target fading.

Abstract:

:With strict fixation, a small uniform target of medium contrast, placed at 10 deg eccentricity, faded much faster when presented on a dynamic random noise background than on either a static random noise background or a uniform background of the same luminance. Time to first disappearance was between 10 and 16 sec when the background was dynamic, 26 sec when it was static, and 57 sec when it was uniform. Times were shortest for temporal noise frequencies of the background between 3.5 and 15 Hz. These findings are unexpected: the frequent change of pixel contrast at the edge of the target should perceptually enhance the border, make it less susceptible to local adaptation, and prevent fading. Instead, dynamic random noise facilitates, rather than suppresses fading. Three potential mechanisms are discussed: edge perturbation, jerk effect and surround induction.

journal_name

Vision Res

journal_title

Vision research

authors

Spillmann L,Kurtenbach A

doi

10.1016/0042-6989(92)90053-l

subject

Has Abstract

pub_date

1992-10-01 00:00:00

pages

1941-6

issue

10

eissn

0042-6989

issn

1878-5646

pii

0042-6989(92)90053-L

journal_volume

32

pub_type

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