arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.05563cs.CV
收藏

基于迁移学习的虚拟现实头盔中部分遮挡下的人脸表情识别

Facial Expression Recognition Under Partial Occlusion from Virtual Reality Headsets based on Transfer Learning

Ryerson University(瑞尔森大学)

Bita Houshmand, Naimul Khan

摘要:

面部表情是人们日常交流的主要渠道,近年来一直是人们研究的热点。在人脸表情识别中,基于卷积神经网络的人脸表情自动推理方法由于其在人脸表情识别中的应用而得到广泛的应用,而虚拟现实(Virtual Reality,VR)作为一种沉浸式多媒体平台,能够提供丰富的多媒体体验。然而,在佩戴头戴式VR耳机时识别面部表情是一项具有挑战性的任务,因为面部的上半部分完全被遮挡。在本文中,我们试图克服这些问题,并专注于面部表情识别中存在的严重闭塞,其中用户戴着盔装显示器在VR设置。我们提出了一个几何模型来模拟由三星Gear VR头戴式耳机产生的遮挡,该模型可以应用于现有的FER数据集。然后,我们采用迁移学习方法,从两个预训练的网络开始,即VGG和ResNet。我们进一步微调FER+和RAF-DB数据集上的网络。实验结果表明,我们的方法实现了与现有方法相当的结果,同时在三个修改后的基准数据集上进行训练,这些数据集坚持佩戴商品VR头戴式设备造成的真实遮挡。本文的代码可在以下网址获得:https://github.com/bita-github/MRP-FER

英文摘要:

Facial expressions of emotion are a major channel in our daily communications, and it has been subject of intense research in recent years. To automatically infer facial expressions, convolutional neural network based approaches has become widely adopted due to their proven applicability to Facial Expression Recognition (FER) task.On the other hand Virtual Reality (VR) has gained popularity as an immersive multimedia platform, where FER can provide enriched media experiences. However, recognizing facial expression while wearing a head-mounted VR headset is a challenging task due to the upper half of the face being completely occluded. In this paper we attempt to overcome these issues and focus on facial expression recognition in presence of a severe occlusion where the user is wearing a head-mounted display in a VR setting. We propose a geometric model to simulate occlusion resulting from a Samsung Gear VR headset that can be applied to existing FER datasets. Then, we adopt a transfer learning approach, starting from two pretrained networks, namely VGG and ResNet. We further fine-tune the networks on FER+ and RAF-DB datasets. Experimental results show that our approach achieves comparable results to existing methods while training on three modified benchmark datasets that adhere to realistic occlusion resulting from wearing a commodity VR headset. Code for this paper is available at: https://github.com/bita-github/MRP-FER

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑