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How spatial frequencies and color drive object search in real-world scenes: A new eye-movement corpus
When studying how people search for objects in scenes, the inhomogeneity of the visual field is often ignored. Due to physiological limitations, peripheral vision is blurred and mainly uses coarse-grained information (i.e., low spatial frequencies) for selecting saccade targets, whereas high-acuity...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Association for Research in Vision and Ophthalmology
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7424126/ http://dx.doi.org/10.1167/jov.20.7.8 |
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author | Cajar, Anke Engbert, Ralf Laubrock, Jochen |
author_facet | Cajar, Anke Engbert, Ralf Laubrock, Jochen |
author_sort | Cajar, Anke |
collection | PubMed |
description | When studying how people search for objects in scenes, the inhomogeneity of the visual field is often ignored. Due to physiological limitations, peripheral vision is blurred and mainly uses coarse-grained information (i.e., low spatial frequencies) for selecting saccade targets, whereas high-acuity central vision uses fine-grained information (i.e., high spatial frequencies) for analysis of details. Here we investigated how spatial frequencies and color affect object search in real-world scenes. Using gaze-contingent filters, we attenuated high or low frequencies in central or peripheral vision while viewers searched color or grayscale scenes. Results showed that peripheral filters and central high-pass filters hardly affected search accuracy, whereas accuracy dropped drastically with central low-pass filters. Peripheral filtering increased the time to localize the target by decreasing saccade amplitudes and increasing number and duration of fixations. The use of coarse-grained information in the periphery was limited to color scenes. Central filtering increased the time to verify target identity instead, especially with low-pass filters. We conclude that peripheral vision is critical for object localization and central vision is critical for object identification. Visual guidance during peripheral object localization is dominated by low-frequency color information, whereas high-frequency information, relatively independent of color, is most important for object identification in central vision. |
format | Online Article Text |
id | pubmed-7424126 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | The Association for Research in Vision and Ophthalmology |
record_format | MEDLINE/PubMed |
spelling | pubmed-74241262020-08-26 How spatial frequencies and color drive object search in real-world scenes: A new eye-movement corpus Cajar, Anke Engbert, Ralf Laubrock, Jochen J Vis Article When studying how people search for objects in scenes, the inhomogeneity of the visual field is often ignored. Due to physiological limitations, peripheral vision is blurred and mainly uses coarse-grained information (i.e., low spatial frequencies) for selecting saccade targets, whereas high-acuity central vision uses fine-grained information (i.e., high spatial frequencies) for analysis of details. Here we investigated how spatial frequencies and color affect object search in real-world scenes. Using gaze-contingent filters, we attenuated high or low frequencies in central or peripheral vision while viewers searched color or grayscale scenes. Results showed that peripheral filters and central high-pass filters hardly affected search accuracy, whereas accuracy dropped drastically with central low-pass filters. Peripheral filtering increased the time to localize the target by decreasing saccade amplitudes and increasing number and duration of fixations. The use of coarse-grained information in the periphery was limited to color scenes. Central filtering increased the time to verify target identity instead, especially with low-pass filters. We conclude that peripheral vision is critical for object localization and central vision is critical for object identification. Visual guidance during peripheral object localization is dominated by low-frequency color information, whereas high-frequency information, relatively independent of color, is most important for object identification in central vision. The Association for Research in Vision and Ophthalmology 2020-07-13 /pmc/articles/PMC7424126/ http://dx.doi.org/10.1167/jov.20.7.8 Text en Copyright 2020, The Authors https://creativecommons.org/licenses/by-nc-nd/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. |
spellingShingle | Article Cajar, Anke Engbert, Ralf Laubrock, Jochen How spatial frequencies and color drive object search in real-world scenes: A new eye-movement corpus |
title | How spatial frequencies and color drive object search in real-world scenes: A new eye-movement corpus |
title_full | How spatial frequencies and color drive object search in real-world scenes: A new eye-movement corpus |
title_fullStr | How spatial frequencies and color drive object search in real-world scenes: A new eye-movement corpus |
title_full_unstemmed | How spatial frequencies and color drive object search in real-world scenes: A new eye-movement corpus |
title_short | How spatial frequencies and color drive object search in real-world scenes: A new eye-movement corpus |
title_sort | how spatial frequencies and color drive object search in real-world scenes: a new eye-movement corpus |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7424126/ http://dx.doi.org/10.1167/jov.20.7.8 |
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