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Eyemotion: Classifying facial expressions in VR using eye-tracking cameras
[article]
<span title="2017-07-28">2017</span>
<i >
arXiv
</i>
<span class="release-stage" >pre-print</span>
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<span title="2017-07-22">2017</span>
<span class="release-stage" >pre-print</span>
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1707.07204v1">arXiv:1707.07204v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/w72qb5ysrngl5ak4grgjkdf2oi">fatcat:w72qb5ysrngl5ak4grgjkdf2oi</a> </span>
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One of the main challenges of social interaction in virtual reality settings is that head-mounted displays occlude a large portion of the face, blocking facial expressions and thereby restricting social engagement cues among users. Hence, auxiliary means of sensing and conveying these expressions are needed. We present an algorithm to automatically infer expressions by analyzing only a partially occluded face while the user is engaged in a virtual reality experience. Specifically, we show that
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<a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1707.07204v2">arXiv:1707.07204v2</a>
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... mages of the user's eyes captured from an IR gaze-tracking camera within a VR headset are sufficient to infer a select subset of facial expressions without the use of any fixed external camera. Using these inferences, we can generate dynamic avatars in real-time which function as an expressive surrogate for the user. We propose a novel data collection pipeline as well as a novel approach for increasing CNN accuracy via personalization. Our results show a mean accuracy of 74 'emotive' expressions and a mean accuracy of 70 distinct facial action units, outperforming human raters.
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