Open Access Publications
From research on the visual systems of turtles, to the perception of faces with or without makeup, to transaccadic perception and perceptual cycles in the brain– VPixx hardware and software solutions have supported research in vision science and beyond for over 20 years. We are immensely proud of the discoveries and accomplishments of our customers across the world.
On this page you will find a non-exhaustive list of peer-reviewed, open access publications citing VPixx tools dating back to 2003. Browse the list or use the tag filter to search for specific products. Note that we report the device used in the paper according to the authors; this may not accurately reflect the specific model of device used (e.g., VIEWPixx vs. VIEWPixx /3D). Nor do we guarantee the accuracy of published content. Please contact our team at [email protected] if you have any questions about a specific paper.
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Use the search tool below to search for specific terms among the titles, authors and abstracts in our library.
1.
Baker, Daniel H.; Richard, Bruno
Dynamic properties of internal noise probed by modulating binocular rivalry Journal Article
In: PLOS Computational Biology, vol. 15, no. 6, pp. e1007071, 2019, ISSN: 1553-7358, (Publisher: Public Library of Science).
Abstract | Links | BibTeX | Tags: 3DPixx, VIEWPixx3D
@article{baker_dynamic_2019,
title = {Dynamic properties of internal noise probed by modulating binocular rivalry},
author = {Daniel H. Baker and Bruno Richard},
url = {https://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1007071},
doi = {10.1371/journal.pcbi.1007071},
issn = {1553-7358},
year = {2019},
date = {2019-06-01},
urldate = {2024-01-02},
journal = {PLOS Computational Biology},
volume = {15},
number = {6},
pages = {e1007071},
abstract = {Neural systems are inherently noisy, and this noise can affect our perception from moment to moment. This is particularly apparent in binocular rivalry, where perception of competing stimuli shown to the left and right eyes alternates over time. We modulated rivalling stimuli using dynamic sequences of external noise of various rates and amplitudes. We repeated each external noise sequence twice, and assessed the consistency of percepts across repetitions. External noise modulations of sufficiently high contrast increased consistency scores above baseline, and were most effective at 1/8Hz. A computational model of rivalry in which internal noise has a 1/f (pink) temporal amplitude spectrum, and a standard deviation of 16% contrast, provided the best account of our data. Our novel technique provides detailed estimates of the dynamic properties of internal noise during binocular rivalry, and by extension the stochastic processes that drive our perception and other types of spontaneous brain activity.},
note = {Publisher: Public Library of Science},
keywords = {3DPixx, VIEWPixx3D},
pubstate = {published},
tppubtype = {article}
}
Neural systems are inherently noisy, and this noise can affect our perception from moment to moment. This is particularly apparent in binocular rivalry, where perception of competing stimuli shown to the left and right eyes alternates over time. We modulated rivalling stimuli using dynamic sequences of external noise of various rates and amplitudes. We repeated each external noise sequence twice, and assessed the consistency of percepts across repetitions. External noise modulations of sufficiently high contrast increased consistency scores above baseline, and were most effective at 1/8Hz. A computational model of rivalry in which internal noise has a 1/f (pink) temporal amplitude spectrum, and a standard deviation of 16% contrast, provided the best account of our data. Our novel technique provides detailed estimates of the dynamic properties of internal noise during binocular rivalry, and by extension the stochastic processes that drive our perception and other types of spontaneous brain activity.
2.
Kim, Byounghoon; Kenchappa, Shobha Channabasappa; Sunkara, Adhira; Chang, Ting-Yu; Thompson, Lowell; Doudlah, Raymond; Rosenberg, Ari
Real-time experimental control using network-based parallel processing Journal Article
In: eLife, vol. 8, pp. e40231, 2019, ISSN: 2050-084X, (Publisher: eLife Sciences Publications, Ltd).
Abstract | Links | BibTeX | Tags: 3DPixx, 3DPolarizer, DATAPixx, PROPixx, VIEWPixx3D
@article{kim_real-time_2019,
title = {Real-time experimental control using network-based parallel processing},
author = {Byounghoon Kim and Shobha Channabasappa Kenchappa and Adhira Sunkara and Ting-Yu Chang and Lowell Thompson and Raymond Doudlah and Ari Rosenberg},
editor = {Sacha B Nelson and Michael J Frank and Sacha B Nelson and Niraj Desai},
url = {https://doi.org/10.7554/eLife.40231},
doi = {10.7554/eLife.40231},
issn = {2050-084X},
year = {2019},
date = {2019-02-01},
urldate = {2024-01-17},
journal = {eLife},
volume = {8},
pages = {e40231},
abstract = {Modern neuroscience research often requires the coordination of multiple processes such as stimulus generation, real-time experimental control, as well as behavioral and neural measurements. The technical demands required to simultaneously manage these processes with high temporal fidelity is a barrier that limits the number of labs performing such work. Here we present an open-source, network-based parallel processing framework that lowers this barrier. The Real-Time Experimental Control with Graphical User Interface (REC-GUI) framework offers multiple advantages: (i) a modular design that is agnostic to coding language(s) and operating system(s) to maximize experimental flexibility and minimize researcher effort, (ii) simple interfacing to connect multiple measurement and recording devices, (iii) high temporal fidelity by dividing task demands across CPUs, and (iv) real-time control using a fully customizable and intuitive GUI. We present applications for human, non-human primate, and rodent studies which collectively demonstrate that the REC-GUI framework facilitates technically demanding, behavior-contingent neuroscience research. Editorial note: This article has been through an editorial process in which the authors decide how to respond to the issues raised during peer review. The Reviewing Editor's assessment is that all the issues have been addressed (see decision letter).},
note = {Publisher: eLife Sciences Publications, Ltd},
keywords = {3DPixx, 3DPolarizer, DATAPixx, PROPixx, VIEWPixx3D},
pubstate = {published},
tppubtype = {article}
}
Modern neuroscience research often requires the coordination of multiple processes such as stimulus generation, real-time experimental control, as well as behavioral and neural measurements. The technical demands required to simultaneously manage these processes with high temporal fidelity is a barrier that limits the number of labs performing such work. Here we present an open-source, network-based parallel processing framework that lowers this barrier. The Real-Time Experimental Control with Graphical User Interface (REC-GUI) framework offers multiple advantages: (i) a modular design that is agnostic to coding language(s) and operating system(s) to maximize experimental flexibility and minimize researcher effort, (ii) simple interfacing to connect multiple measurement and recording devices, (iii) high temporal fidelity by dividing task demands across CPUs, and (iv) real-time control using a fully customizable and intuitive GUI. We present applications for human, non-human primate, and rodent studies which collectively demonstrate that the REC-GUI framework facilitates technically demanding, behavior-contingent neuroscience research. Editorial note: This article has been through an editorial process in which the authors decide how to respond to the issues raised during peer review. The Reviewing Editor's assessment is that all the issues have been addressed (see decision letter).
3.
Asher, Jordi M.; Hibbard, Paul B.
First- and second-order contributions to depth perception in anti-correlated random dot stereograms Journal Article
In: Scientific Reports, vol. 8, no. 1, pp. 14120, 2018, ISSN: 2045-2322, (Number: 1 Publisher: Nature Publishing Group).
Abstract | Links | BibTeX | Tags: 3DPixx, VIEWPixx3D
@article{asher_first-_2018,
title = {First- and second-order contributions to depth perception in anti-correlated random dot stereograms},
author = {Jordi M. Asher and Paul B. Hibbard},
url = {https://www.nature.com/articles/s41598-018-32500-4},
doi = {10.1038/s41598-018-32500-4},
issn = {2045-2322},
year = {2018},
date = {2018-09-01},
urldate = {2024-01-03},
journal = {Scientific Reports},
volume = {8},
number = {1},
pages = {14120},
abstract = {The binocular energy model of neural responses predicts that depth from binocular disparity might be perceived in the reversed direction when the contrast of dots presented to one eye is reversed. While reversed-depth has been found using anti-correlated random-dot stereograms (ACRDS) the findings are inconsistent across studies. The mixed findings may be accounted for by the presence of a gap between the target and surround, or as a result of overlap of dots around the vertical edges of the stimuli. To test this, we assessed whether (1) the gap size (0, 19.2 or 38.4 arc min) (2) the correlation of dots or (3) the border orientation (circular target, or horizontal or vertical edge) affected the perception of depth. Reversed-depth from ACRDS (circular no-gap condition) was seen by a minority of participants, but this effect reduced as the gap size increased. Depth was mostly perceived in the correct direction for ACRDS edge stimuli, with the effect increasing with the gap size. The inconsistency across conditions can be accounted for by the relative reliability of first- and second-order depth detection mechanisms, and the coarse spatial resolution of the latter.},
note = {Number: 1
Publisher: Nature Publishing Group},
keywords = {3DPixx, VIEWPixx3D},
pubstate = {published},
tppubtype = {article}
}
The binocular energy model of neural responses predicts that depth from binocular disparity might be perceived in the reversed direction when the contrast of dots presented to one eye is reversed. While reversed-depth has been found using anti-correlated random-dot stereograms (ACRDS) the findings are inconsistent across studies. The mixed findings may be accounted for by the presence of a gap between the target and surround, or as a result of overlap of dots around the vertical edges of the stimuli. To test this, we assessed whether (1) the gap size (0, 19.2 or 38.4 arc min) (2) the correlation of dots or (3) the border orientation (circular target, or horizontal or vertical edge) affected the perception of depth. Reversed-depth from ACRDS (circular no-gap condition) was seen by a minority of participants, but this effect reduced as the gap size increased. Depth was mostly perceived in the correct direction for ACRDS edge stimuli, with the effect increasing with the gap size. The inconsistency across conditions can be accounted for by the relative reliability of first- and second-order depth detection mechanisms, and the coarse spatial resolution of the latter.
4.
Maloney, Ryan T.; Kaestner, Milena; Bruce, Alison; Bloj, Marina; Harris, Julie M.; Wade, Alex R.
Sensitivity to Velocity- and Disparity-Based Cues to Motion-In-Depth With and Without Spared Stereopsis in Binocular Visual Impairment Journal Article
In: Investigative Ophthalmology & Visual Science, vol. 59, no. 11, pp. 4375–4383, 2018, ISSN: 1552-5783.
Abstract | Links | BibTeX | Tags: 3DPixx, VIEWPixx3D
@article{maloney_sensitivity_2018,
title = {Sensitivity to Velocity- and Disparity-Based Cues to Motion-In-Depth With and Without Spared Stereopsis in Binocular Visual Impairment},
author = {Ryan T. Maloney and Milena Kaestner and Alison Bruce and Marina Bloj and Julie M. Harris and Alex R. Wade},
url = {https://doi.org/10.1167/iovs.17-23692},
doi = {10.1167/iovs.17-23692},
issn = {1552-5783},
year = {2018},
date = {2018-09-01},
urldate = {2024-01-17},
journal = {Investigative Ophthalmology & Visual Science},
volume = {59},
number = {11},
pages = {4375–4383},
abstract = {Two binocular sources of information serve motion-in-depth (MID) perception: changes in disparity over time (CD), and interocular velocity differences (IOVD). While CD requires the computation of small spatial disparities, IOVD could be computed from a much lower-resolution signal. IOVD signals therefore might still be available under conditions of binocular vision impairment (BVI) with limited or no stereopsis, for example, amblyopia. Sensitivity to CD and IOVD was measured in adults who had undergone therapy to correct optical misalignment or amblyopia in childhood (n = 16), as well as normal vision controls with good stereoacuity (n = 8). Observers discriminated the interval containing a smoothly oscillating MID “test” stimulus from a “control” stimulus in a two-interval forced choice paradigm. Of the BVI observers with no static stereoacuity (n = 9), one displayed evidence for sensitivity to IOVD only, while there was otherwise no sensitivity for either CD or IOVD in the group. Generally, BVI observers with measurable stereoacuity (n = 7) displayed a pattern resembling the control group: showing a similar sensitivity for both cues. A neutral density filter placed in front of the fixing eye in a subset of BVI observers did not improve performance. In one BVI observer there was preserved sensitivity to IOVD but not CD, though overall only those BVI observers with at least gross stereopsis were able to detect disparity- or velocity-based cues to MID. The results imply that these logically distinct information sources are somehow coupled, and in some cases BVI observers with no stereopsis may still retain sensitivity to IOVD.},
keywords = {3DPixx, VIEWPixx3D},
pubstate = {published},
tppubtype = {article}
}
Two binocular sources of information serve motion-in-depth (MID) perception: changes in disparity over time (CD), and interocular velocity differences (IOVD). While CD requires the computation of small spatial disparities, IOVD could be computed from a much lower-resolution signal. IOVD signals therefore might still be available under conditions of binocular vision impairment (BVI) with limited or no stereopsis, for example, amblyopia. Sensitivity to CD and IOVD was measured in adults who had undergone therapy to correct optical misalignment or amblyopia in childhood (n = 16), as well as normal vision controls with good stereoacuity (n = 8). Observers discriminated the interval containing a smoothly oscillating MID “test” stimulus from a “control” stimulus in a two-interval forced choice paradigm. Of the BVI observers with no static stereoacuity (n = 9), one displayed evidence for sensitivity to IOVD only, while there was otherwise no sensitivity for either CD or IOVD in the group. Generally, BVI observers with measurable stereoacuity (n = 7) displayed a pattern resembling the control group: showing a similar sensitivity for both cues. A neutral density filter placed in front of the fixing eye in a subset of BVI observers did not improve performance. In one BVI observer there was preserved sensitivity to IOVD but not CD, though overall only those BVI observers with at least gross stereopsis were able to detect disparity- or velocity-based cues to MID. The results imply that these logically distinct information sources are somehow coupled, and in some cases BVI observers with no stereopsis may still retain sensitivity to IOVD.
5.
Smith, Danielle; Ropar, Danielle; Allen, Harriet A.
The Integration of Occlusion and Disparity Information for Judging Depth in Autism Spectrum Disorder Journal Article
In: Journal of Autism and Developmental Disorders, vol. 47, no. 10, pp. 3112–3124, 2017, ISSN: 1573-3432.
Abstract | Links | BibTeX | Tags: 3DPixx, DATAPixx
@article{smith_integration_2017,
title = {The Integration of Occlusion and Disparity Information for Judging Depth in Autism Spectrum Disorder},
author = {Danielle Smith and Danielle Ropar and Harriet A. Allen},
url = {https://doi.org/10.1007/s10803-017-3234-x},
doi = {10.1007/s10803-017-3234-x},
issn = {1573-3432},
year = {2017},
date = {2017-10-01},
urldate = {2024-01-18},
journal = {Journal of Autism and Developmental Disorders},
volume = {47},
number = {10},
pages = {3112–3124},
abstract = {In autism spectrum disorder (ASD), atypical integration of visual depth cues may be due to flattened perceptual priors or selective fusion. The current study attempts to disentangle these explanations by psychophysically assessing within-modality integration of ordinal (occlusion) and metric (disparity) depth cues while accounting for sensitivity to stereoscopic information. Participants included 22 individuals with ASD and 23 typically developing matched controls. Although adults with ASD were found to have significantly poorer stereoacuity, they were still able to automatically integrate conflicting depth cues, lending support to the idea that priors are intact in ASD. However, dissimilarities in response speed variability between the ASD and TD groups suggests that there may be differences in the perceptual decision-making aspect of the task.},
keywords = {3DPixx, DATAPixx},
pubstate = {published},
tppubtype = {article}
}
In autism spectrum disorder (ASD), atypical integration of visual depth cues may be due to flattened perceptual priors or selective fusion. The current study attempts to disentangle these explanations by psychophysically assessing within-modality integration of ordinal (occlusion) and metric (disparity) depth cues while accounting for sensitivity to stereoscopic information. Participants included 22 individuals with ASD and 23 typically developing matched controls. Although adults with ASD were found to have significantly poorer stereoacuity, they were still able to automatically integrate conflicting depth cues, lending support to the idea that priors are intact in ASD. However, dissimilarities in response speed variability between the ASD and TD groups suggests that there may be differences in the perceptual decision-making aspect of the task.
6.
Hibbard, Paul B.; Haines, Alice E.; Hornsey, Rebecca L.
Magnitude, precision, and realism of depth perception in stereoscopic vision Journal Article
In: Cognitive Research: Principles and Implications, vol. 2, pp. 25, 2017, ISSN: 2365-7464.
Abstract | Links | BibTeX | Tags: 3DPixx, RESPONSEPixx, VIEWPixx3D
@article{hibbard_magnitude_2017,
title = {Magnitude, precision, and realism of depth perception in stereoscopic vision},
author = {Paul B. Hibbard and Alice E. Haines and Rebecca L. Hornsey},
url = {https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5442194/},
doi = {10.1186/s41235-017-0062-7},
issn = {2365-7464},
year = {2017},
date = {2017-05-01},
urldate = {2024-01-12},
journal = {Cognitive Research: Principles and Implications},
volume = {2},
pages = {25},
abstract = {Our perception of depth is substantially enhanced by the fact that we have binocular vision. This provides us with more precise and accurate estimates of depth and an improved qualitative appreciation of the three-dimensional (3D) shapes and positions of objects. We assessed the link between these quantitative and qualitative aspects of 3D vision. Specifically, we wished to determine whether the realism of apparent depth from binocular cues is associated with the magnitude or precision of perceived depth and the degree of binocular fusion. We presented participants with stereograms containing randomly positioned circles and measured how the magnitude, realism, and precision of depth perception varied with the size of the disparities presented. We found that as the size of the disparity increased, the magnitude of perceived depth increased, while the precision with which observers could make depth discrimination judgments decreased. Beyond an initial increase, depth realism decreased with increasing disparity magnitude. This decrease occurred well below the disparity limit required to ensure comfortable viewing.},
keywords = {3DPixx, RESPONSEPixx, VIEWPixx3D},
pubstate = {published},
tppubtype = {article}
}
Our perception of depth is substantially enhanced by the fact that we have binocular vision. This provides us with more precise and accurate estimates of depth and an improved qualitative appreciation of the three-dimensional (3D) shapes and positions of objects. We assessed the link between these quantitative and qualitative aspects of 3D vision. Specifically, we wished to determine whether the realism of apparent depth from binocular cues is associated with the magnitude or precision of perceived depth and the degree of binocular fusion. We presented participants with stereograms containing randomly positioned circles and measured how the magnitude, realism, and precision of depth perception varied with the size of the disparities presented. We found that as the size of the disparity increased, the magnitude of perceived depth increased, while the precision with which observers could make depth discrimination judgments decreased. Beyond an initial increase, depth realism decreased with increasing disparity magnitude. This decrease occurred well below the disparity limit required to ensure comfortable viewing.
7.
Baker, Daniel H.; Kaestner, Milena; Gouws, André D.
Measurement of crosstalk in stereoscopic display systems used for vision research Journal Article
In: Journal of Vision, vol. 16, no. 15, pp. 14, 2016, ISSN: 1534-7362.
Abstract | Links | BibTeX | Tags: 3DPixx, 3DPolarizer, PROPixx, VIEWPixx3D
@article{baker_measurement_2016,
title = {Measurement of crosstalk in stereoscopic display systems used for vision research},
author = {Daniel H. Baker and Milena Kaestner and André D. Gouws},
url = {https://doi.org/10.1167/16.15.14},
doi = {10.1167/16.15.14},
issn = {1534-7362},
year = {2016},
date = {2016-12-01},
urldate = {2024-01-12},
journal = {Journal of Vision},
volume = {16},
number = {15},
pages = {14},
abstract = {Studying binocular vision requires precise control over the stimuli presented to the left and right eyes. A popular technique is to segregate signals either temporally (frame interleaving), spectrally (using colored filters), or through light polarization. None of these segregation methods achieves perfect isolation, and so a degree of crosstalk is usually apparent, in which signals intended for one eye are faintly visible to the other eye. Previous studies have reported crosstalk values mostly for consumer-grade systems. Here we measure crosstalk for eight systems, many of which are intended for use in vision research. We provide benchmark crosstalk values, report a negative crosstalk effect in some LCD-based systems, and give guidelines for dealing with crosstalk in different experimental paradigms.},
keywords = {3DPixx, 3DPolarizer, PROPixx, VIEWPixx3D},
pubstate = {published},
tppubtype = {article}
}
Studying binocular vision requires precise control over the stimuli presented to the left and right eyes. A popular technique is to segregate signals either temporally (frame interleaving), spectrally (using colored filters), or through light polarization. None of these segregation methods achieves perfect isolation, and so a degree of crosstalk is usually apparent, in which signals intended for one eye are faintly visible to the other eye. Previous studies have reported crosstalk values mostly for consumer-grade systems. Here we measure crosstalk for eight systems, many of which are intended for use in vision research. We provide benchmark crosstalk values, report a negative crosstalk effect in some LCD-based systems, and give guidelines for dealing with crosstalk in different experimental paradigms.
8.
Hornsey, Rebecca L.; Hibbard, Paul B.; Scarfe, Peter
Binocular Depth Judgments on Smoothly Curved Surfaces Journal Article
In: PLOS ONE, vol. 11, no. 11, pp. e0165932, 2016, ISSN: 1932-6203, (Publisher: Public Library of Science).
Abstract | Links | BibTeX | Tags: 3DPixx, RESPONSEPixx, VIEWPixx3D
@article{hornsey_binocular_2016,
title = {Binocular Depth Judgments on Smoothly Curved Surfaces},
author = {Rebecca L. Hornsey and Paul B. Hibbard and Peter Scarfe},
url = {https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0165932},
doi = {10.1371/journal.pone.0165932},
issn = {1932-6203},
year = {2016},
date = {2016-11-01},
urldate = {2023-12-22},
journal = {PLOS ONE},
volume = {11},
number = {11},
pages = {e0165932},
abstract = {Binocular disparity is an important cue to depth, allowing us to make very fine discriminations of the relative depth of objects. In complex scenes, this sensitivity depends on the particular shape and layout of the objects viewed. For example, judgments of the relative depths of points on a smoothly curved surface are less accurate than those for points in empty space. It has been argued that this occurs because depth relationships are represented accurately only within a local spatial area. A consequence of this is that, when judging the relative depths of points separated by depth maxima and minima, information must be integrated across separate local representations. This integration, by adding more stages of processing, might be expected to reduce the accuracy of depth judgements. We tested this idea directly by measuring how accurately human participants could report the relative depths of two dots, presented with different binocular disparities. In the first, Two Dot condition the two dots were presented in front of a square grid. In the second, Three Dot condition, an additional dot was presented midway between the target dots, at a range of depths, both nearer and further than the target dots. In the final, Surface condition, the target dots were placed on a smooth surface defined by binocular disparity cues. In some trials, this contained a depth maximum or minimum between the target dots. In the Three Dot condition, performance was impaired when the central dot was presented with a large disparity, in line with predictions. In the Surface condition, performance was worst when the midpoint of the surface was at a similar distance to the targets, and relatively unaffected when there was a large depth maximum or minimum present. These results are not consistent with the idea that depth order is represented only within a local spatial area.},
note = {Publisher: Public Library of Science},
keywords = {3DPixx, RESPONSEPixx, VIEWPixx3D},
pubstate = {published},
tppubtype = {article}
}
Binocular disparity is an important cue to depth, allowing us to make very fine discriminations of the relative depth of objects. In complex scenes, this sensitivity depends on the particular shape and layout of the objects viewed. For example, judgments of the relative depths of points on a smoothly curved surface are less accurate than those for points in empty space. It has been argued that this occurs because depth relationships are represented accurately only within a local spatial area. A consequence of this is that, when judging the relative depths of points separated by depth maxima and minima, information must be integrated across separate local representations. This integration, by adding more stages of processing, might be expected to reduce the accuracy of depth judgements. We tested this idea directly by measuring how accurately human participants could report the relative depths of two dots, presented with different binocular disparities. In the first, Two Dot condition the two dots were presented in front of a square grid. In the second, Three Dot condition, an additional dot was presented midway between the target dots, at a range of depths, both nearer and further than the target dots. In the final, Surface condition, the target dots were placed on a smooth surface defined by binocular disparity cues. In some trials, this contained a depth maximum or minimum between the target dots. In the Three Dot condition, performance was impaired when the central dot was presented with a large disparity, in line with predictions. In the Surface condition, performance was worst when the midpoint of the surface was at a similar distance to the targets, and relatively unaffected when there was a large depth maximum or minimum present. These results are not consistent with the idea that depth order is represented only within a local spatial area.
9.
Abuleil, Dania; Begum, Viquar Unnisa; Wei, Steven; Abuleil, Ammar; Thompson, Benjamin; McCulloch, Daphne L
Noise coherence thresholds for stereopsis Journal Article
In: Investigative Ophthalmology & Visual Science, vol. 57, no. 12, pp. 1500, 2016, ISSN: 1552-5783.
Abstract | BibTeX | Tags: 3DPixx, VIEWPixx3D
@article{abuleil_noise_2016,
title = {Noise coherence thresholds for stereopsis},
author = {Dania Abuleil and Viquar Unnisa Begum and Steven Wei and Ammar Abuleil and Benjamin Thompson and Daphne L McCulloch},
issn = {1552-5783},
year = {2016},
date = {2016-09-01},
journal = {Investigative Ophthalmology & Visual Science},
volume = {57},
number = {12},
pages = {1500},
abstract = {To evaluate typical adult coherence thresholds for global stereopsis using random dot stereograms of corrugated surfaces containing noise. Stimuli were random dot stereograms that carried disparity-defined sinusoidal gratings (0.77 cycles/ degree) presented at each of 5 disparity levels (1.2, 2.5, 3.7, 5.0 or 7.4 minutes of arc). Noise dots were positioned with random disparities within the depth defined by the corrugated surface of the stereograms to vary the coherence of the stimulus. A VPixx® 3D stimulus system equipped with Nvidia 3D goggles was used for dichoptic presentation. Coherence thresholds for coarse grating orientation discrimination (vertical vs. horizontal vs. oblique) were obtained using a psychometric staircase procedure. Ten adults with normal binocular vision participated. For the 3.7 disparity stimulus, thresholds were re-tested with neutral density filters (0.6, 1.2 and 1.8) in front of the non-dominant eye to simulate abnormal binocular function. The mean coherence required for disparity defined orientation discrimination was 43.0% (±11.6%). Coherence thresholds varied with stimulus disparity (ANOVA, p<0.001). Specifically, thresholds were significantly elevated for the smallest and largest disparity levels (p<0.001). Disrupting binocular vision using ND filters affected coherence thresholds (ANOVA, p<0.001). Thresholds increased with increasing filter density (35±10%, 44±18% and 61±14%, respectively). The coherence threshold for global form detection in random-dot stereograms with noise dots is a measure of stereopsis that is complementary to the conventional disparity threshold measure. Coherence stereo-thresholds are systematically affected by simulated disruption of binocularity and appear to reflect the quality of binocular vision. This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.},
keywords = {3DPixx, VIEWPixx3D},
pubstate = {published},
tppubtype = {article}
}
To evaluate typical adult coherence thresholds for global stereopsis using random dot stereograms of corrugated surfaces containing noise. Stimuli were random dot stereograms that carried disparity-defined sinusoidal gratings (0.77 cycles/ degree) presented at each of 5 disparity levels (1.2, 2.5, 3.7, 5.0 or 7.4 minutes of arc). Noise dots were positioned with random disparities within the depth defined by the corrugated surface of the stereograms to vary the coherence of the stimulus. A VPixx® 3D stimulus system equipped with Nvidia 3D goggles was used for dichoptic presentation. Coherence thresholds for coarse grating orientation discrimination (vertical vs. horizontal vs. oblique) were obtained using a psychometric staircase procedure. Ten adults with normal binocular vision participated. For the 3.7 disparity stimulus, thresholds were re-tested with neutral density filters (0.6, 1.2 and 1.8) in front of the non-dominant eye to simulate abnormal binocular function. The mean coherence required for disparity defined orientation discrimination was 43.0% (±11.6%). Coherence thresholds varied with stimulus disparity (ANOVA, p<0.001). Specifically, thresholds were significantly elevated for the smallest and largest disparity levels (p<0.001). Disrupting binocular vision using ND filters affected coherence thresholds (ANOVA, p<0.001). Thresholds increased with increasing filter density (35±10%, 44±18% and 61±14%, respectively). The coherence threshold for global form detection in random-dot stereograms with noise dots is a measure of stereopsis that is complementary to the conventional disparity threshold measure. Coherence stereo-thresholds are systematically affected by simulated disruption of binocularity and appear to reflect the quality of binocular vision. This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.
10.
Haines, Alice E.; Hornsey, Rebecca L.; Hibbard, Paul B.
Quality, quantity and precision of depth perception in stereoscopic displays Proceedings Article
In: 2015 International Conference on 3D Imaging (IC3D), pp. 1–6, IEEE, Liège, Belgium, 2015, ISBN: 978-1-5090-1265-7.
Abstract | Links | BibTeX | Tags: 3DPixx, RESPONSEPixx, VIEWPixx3D
@inproceedings{haines_quality_2015,
title = {Quality, quantity and precision of depth perception in stereoscopic displays},
author = {Alice E. Haines and Rebecca L. Hornsey and Paul B. Hibbard},
url = {http://ieeexplore.ieee.org/document/7391813/},
doi = {10.1109/IC3D.2015.7391813},
isbn = {978-1-5090-1265-7},
year = {2015},
date = {2015-12-01},
urldate = {2024-01-17},
booktitle = {2015 International Conference on 3D Imaging (IC3D)},
pages = {1–6},
publisher = {IEEE},
address = {Liège, Belgium},
abstract = {Stereoscopic 3D viewing (S3D) can create a clear and compelling improvement in the quality of the 3D experience compared with 2D displays. This improvement is distinct from any change in the amount of depth perceived, or the apparent 3D shapes of objects and the distances between them. It has been suggested instead that the enhanced feeling of realness is associated more with the precision with which we see depth. We measured the contribution of stereoscopic cues to the quality of depth perception in simple abstract images and complex natural scenes. We varied the amount of disparity present in the simple scenes in order to dissociate the magnitude and precision of perceived depth. We show that the qualitative enhancement of perceived depth in stereoscopic displays can be readily quantified, and that it is more closely related to the precision than to the magnitude of apparent depth. It is thus possible to make a distinction between scenes that contain more depth, and those that contain better depth.},
keywords = {3DPixx, RESPONSEPixx, VIEWPixx3D},
pubstate = {published},
tppubtype = {inproceedings}
}
Stereoscopic 3D viewing (S3D) can create a clear and compelling improvement in the quality of the 3D experience compared with 2D displays. This improvement is distinct from any change in the amount of depth perceived, or the apparent 3D shapes of objects and the distances between them. It has been suggested instead that the enhanced feeling of realness is associated more with the precision with which we see depth. We measured the contribution of stereoscopic cues to the quality of depth perception in simple abstract images and complex natural scenes. We varied the amount of disparity present in the simple scenes in order to dissociate the magnitude and precision of perceived depth. We show that the qualitative enhancement of perceived depth in stereoscopic displays can be readily quantified, and that it is more closely related to the precision than to the magnitude of apparent depth. It is thus possible to make a distinction between scenes that contain more depth, and those that contain better depth.