Linked Life Data

15797773

Source:http://linkedlifedata.com/resource/pubmed/id/15797773

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
14
pubmed:dateCreated
2005-3-30
pubmed:abstractText
Visual perception is limited by both the strength of the neural signals, and by the noise in the visual nervous system; however, little is known about what aspects of the input noise the human visual system is sensitive to, i.e., what is the signal in noise? In order to investigate this question we asked observers to discriminate differences in the strength of one-dimensional white noise. We measured their response consistency and classification images and compared the results with an ideal energy detector. Our results and modelling show that discrimination of noise is limited by the observer's template (i.e., the weighted combination of energy in each stimulus component) plus higher order nonlinearities (systematic noise), and by sources of random internal noise. We found that systematic noise is present only near detection threshold. Surprisingly, we found that the human template is "adaptive"-- its shape depends on the spatial frequency band of the noise-suggesting that sensitivity to spatial noise is not simply determined via passive filtering.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0042-6989
pubmed:author
pubmed:issnType
Print
pubmed:volume
45
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1835-46
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
What is the signal in noise?
pubmed:affiliation
University of California, Berkeley, School of Optometry and The Helen Wills Neuroscience Institute, Berkeley, CA 94720-2020, USA. dlevi@berkeley.edu
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, N.I.H., Extramural