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ISSN: 1023-5086


ISSN: 1023-5086

Scientific and technical

Opticheskii Zhurnal

A full-text English translation of the journal is published by Optica Publishing Group under the title “Journal of Optical Technology”

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УДК: 004.93'12, 004.932, 007.51, 159.93

Image perception in visual-search tasks when dynamic noise is present

For Russian citation (Opticheskii Zhurnal):

Хараузов А.К., Васильев П.П., Соколов А.В., Шелепин Ю.Е., Кувалдина М.Б., Борачук О.В., Фокин В.А., Пронин С.В. Восприятие изображений в задачах зрительного поиска в условиях динамической помехи // Оптический журнал. 2015. Т. 82. № 5. С. 42–55.


Kharauzov A.K., Vasiliev P.P., Sokolov A.V., Shelepin Yu.E., Kuvaldina M.B., Borachuk O.V., Fokin V.A., Pronin S.V. Image perception in visual-search tasks when dynamic noise is present [in Russian] // Opticheskii Zhurnal. 2015. V. 82. № 5. P. 42–55.

For citation (Journal of Optical Technology):

A. K. Kharauzov, P. P. Vasil’ev, Yu. E. Shelepin, S. V. Pronin, A. V. Sokolov, V. A. Fokin, M. B. Kuvaldina, and O. V. Borachuk, "Image perception in visual-search tasks when dynamic noise is present," Journal of Optical Technology. 82(5), 298-307 (2015).


The methods of neuroiconics and functional magnetic-resonance tomography are used to investigate the factors that limit the possibilities of visual search. The influence of an image of a human face hidden in the background on the activity of the observer’s brain was recorded during the task of tracking a moving ring. It is established that images are unconsciously perceived under threshold-presentation conditions, and this is reflected in the activation of the fusiform gyrus—a region of the brain that participates in face recognition. Under above-threshold presentation conditions, the parietal and frontal regions of the brain were also activated, but activity in this case decreased in the auditory, motor, and certain other regions of the brain not occupied in signal processing. The resulting data reveal the significance of the background semantics under conditions of visual search and explain how the unconsciously perceived optical characteristics of a background image can affect the operator’s functional state.


visual search, image synthesis, inattentional blindness, brain activity patterns, fMRT


This work was supported by grants of the Russian Humanitarian Scientific Foundation No. 12-06-00947 (digital synthesis of images, processing of a BOLD signal) and a grant of the Russian Scientific Foundation No. 14-15-00918 (preparation and performance of fMRT measurements).

OCIS codes: 100.4999, 100.6950, 330.5000


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