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Visual search controlled by spatial frequency without salient features in an image
Author(s) -
Kato Kazuo,
Tashiro Kazuki,
Kuroki Tomohiro,
Ishikawa Atsuo
Publication year - 2015
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.22169
Subject(s) - visual search , salient , spatial frequency , stimulus (psychology) , luminance , computer science , computer vision , artificial intelligence , eye movement , visual perception , psychology , perception , optics , cognitive psychology , physics , neuroscience
To clarify the characteristics of visual search that are controlled by spatial frequency, we measured the scan path during eye movement in response to visual stimuli. A target stimulus with the spatial frequency of 1/ f β (where β is the slope of power spectral density of luminance in an image) was embedded in a background stimulus with white (1/ f 0 ) characteristics. An instruction‐based task was employed in this study, wherein a subject searches for the target as rapidly as possible and fixates on it. Participants were six healthy males aged 21–22 years. In the task, a threshold for spatial frequency that was the minimum value required by the subjects for the search corresponded to β =∼ 0.2 − 0.3. This finding has potential application in the design of visual presentation media, such as signs and tablets, by providing ease of viewing to the user. © 2015 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.