Measurement of crosstalk in stereoscopic display systems used for vision research

Baker, Daniel H.; Kaestner, Milena; Gouws, André

doi:10.1167/16.15.14

Cited by 37 publications

(20 citation statements)

References 30 publications

(40 reference statements)

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“…The stereo image input was in top-down VGA format and was displayed in interleaved line stereo mode at a resolution of 1,920 3 1,080 p and a refresh rate of 60 Hz: the left-eye image was displayed in even scanlines, and the right-eye image was displayed in odd scanlines. Crosstalk levels for polarizing filter and passive goggle systems, such as the one we used are known to be low (luminance crosstalk: 1.14%, CI: [1.13, 1.15], contrast crosstalk: À0.04%, CI: [À0.28, 0.18]; Baker, Kaestner, & Gouws, 2016).…”

Section: Apparatusmentioning

confidence: 99%

Temporary monocular occlusion facilitates binocular fusion during rivalry

2019

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A few hours of monocular patching temporarily enhances the deprived eye's contribution to binocular vision, constituting a form of adult brain plasticity. Although the mechanism for this plasticity is currently unknown, several imaging studies present evidence that monocular deprivation achieves its effects by changing excitatoryinhibitory balance in the visual cortex. Much of the past work on adult monocular patching utilized binocular rivalry to quantify the patching-induced shift in perceptual eye dominance, extracting periods of exclusive visibility (in which one eye's signal is suppressed from perception) to assess each eye's contribution to binocular vision while overlooking the occurrence of mixed visibility (in which information from both eyes is combined). In this paper, we discuss two experiments to investigate the effects of short-term monocular occlusion on the relative predominance of mixed and exclusive percepts during binocular rivalry. In addition to the known perceptual eyedominance shift, we hypothesized patching would also increase the perception of mixtures during rivalry due to deprivation-induced changes in excitatory-inhibitory balance. Our data point to two previously unknown effects of monocular deprivation: (a) a significant increase in the overall fraction and median duration of mixed visibility during rivalry that is detectable up to at least an hour after removing the patch and (b) the overall fraction of superimposition; rather than piecemeal, mixed percepts are specifically enhanced after monocular deprivation. In addition to strengthening the contribution of the deprived eye, our results show that temporary monocular patching enhances the visibility of fused binocular percepts, likely the result of attenuated interocular inhibition.

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Section: Apparatusmentioning

confidence: 99%

Temporary monocular occlusion facilitates binocular fusion during rivalry

2019

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“…23,25 Both Maeda et al 25 and Watanabe et al 26 used red/green anaglyphs, which have been demonstrated to be prone to cross talk. 38 Cross talk is a particular issue for IOVD stimuli where even small amounts of interocular leakage can permit an observer to solve the MID task almost perfectly. Maeda et al 25 report that observers received feedback on the correctness of each trial, 25 though Watanabe et al 26 do not mention whether feedback was used.…”

Section: Discussionmentioning

confidence: 99%

“…The Viewpixx3D has been independently demonstrated to have good temporal properties and limited cross talk for the presentation of stereoscopic stimuli, especially for the highcontrast, dynamic, and transient dot stimuli (see below) used here. 38,39…”

Section: Apparatusmentioning

confidence: 99%

Sensitivity to Velocity- and Disparity-Based Cues to Motion-In-Depth With and Without Spared Stereopsis in Binocular Visual Impairment

Maloney

Kaestner

Bruce

et al. 2018

Invest. Ophthalmol. Vis. Sci.

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“…Crosstalk does not cause ghosts in DRDSs or DRDCs but it does result in the appearance of monocular cues, which may be confounded with cyclopean perception. This problem is generally recognized by researchers (Baker et al, 2016), yet the techniques of proper calibration are often not published. A notable exception is a study by Mulligan (1986) who presented a mathematical model of perceived luminances of the dots in DRDS displays.…”

Section: Comparison To Previous Approachesmentioning

confidence: 99%

Calibration of random dot stereograms and correlograms free of monocular cues

Sari

Buzás

et al. 2020

Journal of Vision

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Dynamic random dot stereograms (DRDSs) and correlograms (DRDCs) are cyclopean stimuli containing binocular depth cues that are ideally, invisible by one eye alone. Thus, they are important tools in assessing stereoscopic function in experimental or ophthalmological diagnostic settings. However, widely used filter-based three-dimensional display technologies often cannot guarantee complete separation of the images intended for the two eyes. Without proper calibration, this may result in unwanted monocular cues in DRDSs and DRDCs, which may bias scientific or diagnostic results. Here, we use a simple mathematical model describing the relationship of digital video values and average luminance and dot contrast in the two eyes. We present an optimization algorithm that provides the set of digital video values that achieve minimal crosstalk at user-defined average luminance and dot contrast for both eyes based on photometric characteristics of a given display. We demonstrated in a psychophysical experiment with color normal participants that this solution is optimal because monocular cues were not detectable at either the calculated or the experimentally measured optima. We also explored the error by which a range of luminance and contrast combinations can be implemented. Although we used a specific monitor and red-green glasses as an example, our method can be easily applied for other filter based three-dimensional systems. This approach is useful for designing psychophysical experiments using cyclopean stimuli for a specific display.

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Measurement of crosstalk in stereoscopic display systems used for vision research

Cited by 37 publications

References 30 publications

Temporary monocular occlusion facilitates binocular fusion during rivalry

Temporary monocular occlusion facilitates binocular fusion during rivalry

Sensitivity to Velocity- and Disparity-Based Cues to Motion-In-Depth With and Without Spared Stereopsis in Binocular Visual Impairment

Calibration of random dot stereograms and correlograms free of monocular cues

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