Synchronizing eye tracking and optical motion capture : How to bring them together
Burger, B., Puupponen, A., & Jantunen, T. (2018). Synchronizing eye tracking and optical motion capture : How to bring them together. Journal of Eye Movement Research, 11(2), 1-16. https://doi.org/10.16910/jemr.11.2.5
Published inJournal of Eye Movement Research
© the Authors, 2018.
Both eye tracking and motion capture technologies are nowadays frequently used in human sciences, although both technologies are usually used separately. However, measuring both eye and body movements simultaneously would offer great potential for investigating crossmodal interaction in human (e.g. music and language-related) behavior. Here we combined an Ergoneers Dikablis head mounted eye tracker with a Qualisys Oqus optical motion capture system. In order to synchronize the recordings of both devices, we developed a generalizable solution that does not rely on any (cost-intensive) ready-made / company-provided synchronization solution. At the beginning of each recording, the participant nods quickly while fixing on a target while keeping the eyes open – a motion yielding a sharp vertical displacement in both mocap and eye data. This displacement can be reliably detected with a peak-picking algorithm and used for accurately aligning the mocap and eye data. This method produces accurate synchronization results in the case of clean data and therefore provides an attractive alternative to costly plug-ins, as well as a solution in case ready-made synchronization solutions are unavailable. ...
PublisherEuropean Group for Eye Movement Research
ISSN Search the Publication Forum1995-8692
Publication in research information system
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