Abstract:
:Luminance has been found to play a modulating role in the processes of many visual tasks. However, the mechanisms underlying the modulation role of luminance have been little studied, and the conclusions have been controversial. Here, using a dichoptic viewing paradigm by varying the luminance in one eye while measuring the contrast-detection threshold in the other eye, we studied the effect of different unilateral mean luminance values on the detectability of sine wave gratings against backgrounds of various levels of white noise in normal subjects. We found that unilateral luminance altered the additive internal noise within a perceptual template model framework, with low luminance increasing the additive internal noise and high luminance reducing it. This finding helps to reveal how luminance modulates contrast detection and its relative mechanisms.
journal_name
Perceptionjournal_title
Perceptionauthors
Li L,Yu Y,Zhou Ydoi
10.1177/0301006615594907subject
Has Abstractpub_date
2015-01-01 00:00:00pages
1215-24issue
10eissn
0301-0066issn
1468-4233pii
0301006615594907journal_volume
44pub_type
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