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Coarse-to-fine interaction on perceived depth in compound grating
To encode binocular disparity, the visual system uses a pair of left eye and right eye bandpass filters with either a position or a phase offset between them. Such pairs are considered to exit at multiple scales to encode a wide range of disparity. However, local disparity measurements by bandpass m...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Association for Research in Vision and Ophthalmology
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10593133/ https://www.ncbi.nlm.nih.gov/pubmed/37856108 http://dx.doi.org/10.1167/jov.23.12.5 |
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author | Chen, Pei-Yin Chen, Chien-Chung Nishida, Shin'ya |
author_facet | Chen, Pei-Yin Chen, Chien-Chung Nishida, Shin'ya |
author_sort | Chen, Pei-Yin |
collection | PubMed |
description | To encode binocular disparity, the visual system uses a pair of left eye and right eye bandpass filters with either a position or a phase offset between them. Such pairs are considered to exit at multiple scales to encode a wide range of disparity. However, local disparity measurements by bandpass mechanisms can be ambiguous, particularly when the actual disparity is larger than a half-cycle of the preferred spatial frequency of the filter, which often occurs in fine scales. In this study, we investigated whether the visual system uses a coarse-to-fine interaction to resolve this ambiguity at finer scales for depth estimation from disparity. The stimuli were stereo grating patches composed of a target and comparison patterns. The target patterns contained spatial frequencies of 1 and 4 cycles per degree (cpd). The phase disparity of the low-frequency component was 0° (at the horopter), –90° (uncrossed), or 90° (crossed), and that of the high-frequency components was changed independent of the low-frequency disparity, in the range between –90° (uncrossed) and 90° (crossed). The observers’ task was to indicate whether the target appeared closer to the comparison pattern, which always shared the disparity with the low-frequency component of the target. Regardless of whether the comparison pattern was a 1-cpd + 4-cpd compound or a 1-cpd simple grating, the perceived depth order of the target and the comparison varied in accordance with the phase disparity of the high-frequency component of the target. This effect occurred not only when the low-frequency component was at the horopter, but also when it contained a large disparity corresponding to one cycle of the high-frequency component (±90°). Our findings suggest a coarse-to-fine interaction in multiscale disparity processing, in which the depth interpretation of the high-frequency changes based on the disparity of the low-frequency component. |
format | Online Article Text |
id | pubmed-10593133 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | The Association for Research in Vision and Ophthalmology |
record_format | MEDLINE/PubMed |
spelling | pubmed-105931332023-10-24 Coarse-to-fine interaction on perceived depth in compound grating Chen, Pei-Yin Chen, Chien-Chung Nishida, Shin'ya J Vis Article To encode binocular disparity, the visual system uses a pair of left eye and right eye bandpass filters with either a position or a phase offset between them. Such pairs are considered to exit at multiple scales to encode a wide range of disparity. However, local disparity measurements by bandpass mechanisms can be ambiguous, particularly when the actual disparity is larger than a half-cycle of the preferred spatial frequency of the filter, which often occurs in fine scales. In this study, we investigated whether the visual system uses a coarse-to-fine interaction to resolve this ambiguity at finer scales for depth estimation from disparity. The stimuli were stereo grating patches composed of a target and comparison patterns. The target patterns contained spatial frequencies of 1 and 4 cycles per degree (cpd). The phase disparity of the low-frequency component was 0° (at the horopter), –90° (uncrossed), or 90° (crossed), and that of the high-frequency components was changed independent of the low-frequency disparity, in the range between –90° (uncrossed) and 90° (crossed). The observers’ task was to indicate whether the target appeared closer to the comparison pattern, which always shared the disparity with the low-frequency component of the target. Regardless of whether the comparison pattern was a 1-cpd + 4-cpd compound or a 1-cpd simple grating, the perceived depth order of the target and the comparison varied in accordance with the phase disparity of the high-frequency component of the target. This effect occurred not only when the low-frequency component was at the horopter, but also when it contained a large disparity corresponding to one cycle of the high-frequency component (±90°). Our findings suggest a coarse-to-fine interaction in multiscale disparity processing, in which the depth interpretation of the high-frequency changes based on the disparity of the low-frequency component. The Association for Research in Vision and Ophthalmology 2023-10-19 /pmc/articles/PMC10593133/ /pubmed/37856108 http://dx.doi.org/10.1167/jov.23.12.5 Text en Copyright 2023 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 Chen, Pei-Yin Chen, Chien-Chung Nishida, Shin'ya Coarse-to-fine interaction on perceived depth in compound grating |
title | Coarse-to-fine interaction on perceived depth in compound grating |
title_full | Coarse-to-fine interaction on perceived depth in compound grating |
title_fullStr | Coarse-to-fine interaction on perceived depth in compound grating |
title_full_unstemmed | Coarse-to-fine interaction on perceived depth in compound grating |
title_short | Coarse-to-fine interaction on perceived depth in compound grating |
title_sort | coarse-to-fine interaction on perceived depth in compound grating |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10593133/ https://www.ncbi.nlm.nih.gov/pubmed/37856108 http://dx.doi.org/10.1167/jov.23.12.5 |
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