Measurement of crosstalk in stereoscopic display systems used for vision research.

Daniel H Baker,Milena Kaestner,André D Gouws

doi:10.1167/16.15.14

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.

Highlights

IntroductionResearchers rely on display systems that are capable of presenting separate images to the left and right eyes
To study binocular vision, researchers rely on display systems that are capable of presenting separate images to the left and right eyes
As the only difference between these systems was the phosphor used in the monitor, the increased crosstalk is due to luminance bleed from phosphor persistence across frames

Summary

Introduction

Researchers rely on display systems that are capable of presenting separate images to the left and right eyes. Other systems separate the signals either spectrally, temporally, or using light polarization, requiring them to be demultiplexed at the eye, typically using active or passive goggles worn by the participant. Such systems suffer from the problem of crosstalk (or ghosting), where images intended for one eye are faintly visible to the other eye (e.g., Pan, Lee, Huang, & Huang, 2010; Wang et al, 2011, 2012). We describe three common methods used for binocular stimulus presentation in a laboratory setting and how crosstalk can arise in these different systems.

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