Visual discomfort and blur

O'Hare, Louise and Hibbard, Paul B. (2013) Visual discomfort and blur. Journal of Vision, 13 (5). p. 7. ISSN 1534-7362

Full content URL: http://dx.doi.org/10.1167/13.5.7

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Abstract

Certain visual stimuli, such as striped patterns and
filtered noise, have been reported to be uncomfortable.
Some filtered noise patterns judged as uncomfortable
are those with a relative decrease in contrast amplitude
at high spatial frequencies, compared with the statistics
typical of natural images. Decreased amplitude at high
spatial frequencies is a characteristic often associated
with perceived blur. Additionally, the distribution of
contrast across spatial frequencies also provides a cue
for the accommodation (focusing) response. The purpose
of this study was to investigate the relationship between
excess low spatial frequency information, discomfort
judgments and perceived blur. Results of these
experiments show that a relative reduction in high
spatial frequency contrast results in both increased
discomfort and perceived blur. This is both in artificial
and natural stimuli. A possible explanation for this
relationship based on accommodation responses is
proposed.

Keywords:blur, spatial frequency, natural images, visual discomfort
Subjects:C Biological Sciences > C830 Experimental Psychology
Divisions:College of Social Science > School of Psychology
ID Code:8866
Deposited On:11 Apr 2013 19:39

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