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Modeling depth from motion parallax with the motion/pursuit ratio
The perception of unambiguous scaled depth from motion parallax relies on both retinal image motion and an extra-retinal pursuit eye movement signal. The motion/pursuit ratio represents a dynamic geometric model linking these two proximal cues to the ratio of depth to viewing distance. An important...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4186274/ https://www.ncbi.nlm.nih.gov/pubmed/25339926 http://dx.doi.org/10.3389/fpsyg.2014.01103 |
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author | Nawrot, Mark Ratzlaff, Michael Leonard, Zachary Stroyan, Keith |
author_facet | Nawrot, Mark Ratzlaff, Michael Leonard, Zachary Stroyan, Keith |
author_sort | Nawrot, Mark |
collection | PubMed |
description | The perception of unambiguous scaled depth from motion parallax relies on both retinal image motion and an extra-retinal pursuit eye movement signal. The motion/pursuit ratio represents a dynamic geometric model linking these two proximal cues to the ratio of depth to viewing distance. An important step in understanding the visual mechanisms serving the perception of depth from motion parallax is to determine the relationship between these stimulus parameters and empirically determined perceived depth magnitude. Observers compared perceived depth magnitude of dynamic motion parallax stimuli to static binocular disparity comparison stimuli at three different viewing distances, in both head-moving and head-stationary conditions. A stereo-viewing system provided ocular separation for stereo stimuli and monocular viewing of parallax stimuli. For each motion parallax stimulus, a point of subjective equality (PSE) was estimated for the amount of binocular disparity that generates the equivalent magnitude of perceived depth from motion parallax. Similar to previous results, perceived depth from motion parallax had significant foreshortening. Head-moving conditions produced even greater foreshortening due to the differences in the compensatory eye movement signal. An empirical version of the motion/pursuit law, termed the empirical motion/pursuit ratio, which models perceived depth magnitude from these stimulus parameters, is proposed. |
format | Online Article Text |
id | pubmed-4186274 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-41862742014-10-22 Modeling depth from motion parallax with the motion/pursuit ratio Nawrot, Mark Ratzlaff, Michael Leonard, Zachary Stroyan, Keith Front Psychol Psychology The perception of unambiguous scaled depth from motion parallax relies on both retinal image motion and an extra-retinal pursuit eye movement signal. The motion/pursuit ratio represents a dynamic geometric model linking these two proximal cues to the ratio of depth to viewing distance. An important step in understanding the visual mechanisms serving the perception of depth from motion parallax is to determine the relationship between these stimulus parameters and empirically determined perceived depth magnitude. Observers compared perceived depth magnitude of dynamic motion parallax stimuli to static binocular disparity comparison stimuli at three different viewing distances, in both head-moving and head-stationary conditions. A stereo-viewing system provided ocular separation for stereo stimuli and monocular viewing of parallax stimuli. For each motion parallax stimulus, a point of subjective equality (PSE) was estimated for the amount of binocular disparity that generates the equivalent magnitude of perceived depth from motion parallax. Similar to previous results, perceived depth from motion parallax had significant foreshortening. Head-moving conditions produced even greater foreshortening due to the differences in the compensatory eye movement signal. An empirical version of the motion/pursuit law, termed the empirical motion/pursuit ratio, which models perceived depth magnitude from these stimulus parameters, is proposed. Frontiers Media S.A. 2014-10-06 /pmc/articles/PMC4186274/ /pubmed/25339926 http://dx.doi.org/10.3389/fpsyg.2014.01103 Text en Copyright © 2014 Nawrot, Ratzlaff, Leonard and Stroyan. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Psychology Nawrot, Mark Ratzlaff, Michael Leonard, Zachary Stroyan, Keith Modeling depth from motion parallax with the motion/pursuit ratio |
title | Modeling depth from motion parallax with the motion/pursuit ratio |
title_full | Modeling depth from motion parallax with the motion/pursuit ratio |
title_fullStr | Modeling depth from motion parallax with the motion/pursuit ratio |
title_full_unstemmed | Modeling depth from motion parallax with the motion/pursuit ratio |
title_short | Modeling depth from motion parallax with the motion/pursuit ratio |
title_sort | modeling depth from motion parallax with the motion/pursuit ratio |
topic | Psychology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4186274/ https://www.ncbi.nlm.nih.gov/pubmed/25339926 http://dx.doi.org/10.3389/fpsyg.2014.01103 |
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