arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2106.02258cs.CV
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探索对抗学习用于深度半监督面部动作单元识别

Exploring Adversarial Learning for Deep Semi-Supervised Facial Action Unit Recognition

University of Science and Technology of China(中国科学技术大学)

Shangfei Wang, Yanan Chang, Guozhu Peng, Bowen Pan

摘要:

目前的工作制定面部动作单元(AU)识别作为一个监督学习的问题,在训练过程中需要完全AU标记的面部图像。为大量的面部图像提供AU注释是具有挑战性的,如果不是不可能的话。幸运的是,AU出现在所有面部图像上,无论是否手动标记,都满足潜在的解剖机制和人类行为习惯。在本文中,我们提出了一个深度半监督框架,用于从部分AU标记的面部图像中识别面部动作单元。具体来说,所提出的深度半监督AU识别方法由深度识别网络和CNOD组成。深度识别网络R从大规模面部图像学习面部表示,并从有限的地面真实AU标签学习AU分类器。引入了AR-3D以加强地面真实AU标签中固有的AU分布与来自标记和未标记面部图像的预测AU标签的分布之间的统计相似性。深度识别网络旨在最大限度地减少标记面部图像的识别损失,忠实地表示标记和未标记面部图像的固有AU分布,并混淆图像。在训练过程中,深度识别网络R和BND交替优化。因此,在训练期间,利用由潜在解剖机制引起的固有AU分布来从部分AU标记的数据构建更好的特征表示和AU分类器。在两个基准数据库上的实验表明,该方法通过对抗学习成功地捕获了AU分布,并优于最先进的AU识别工作。

英文摘要:

Current works formulate facial action unit (AU) recognition as a supervised learning problem, requiring fully AU-labeled facial images during training. It is challenging if not impossible to provide AU annotations for large numbers of facial images. Fortunately, AUs appear on all facial images, whether manually labeled or not, satisfy the underlying anatomic mechanisms and human behavioral habits. In this paper, we propose a deep semi-supervised framework for facial action unit recognition from partially AU-labeled facial images. Specifically, the proposed deep semi-supervised AU recognition approach consists of a deep recognition network and a discriminator D. The deep recognition network R learns facial representations from large-scale facial images and AU classifiers from limited ground truth AU labels. The discriminator D is introduced to enforce statistical similarity between the AU distribution inherent in ground truth AU labels and the distribution of the predicted AU labels from labeled and unlabeled facial images. The deep recognition network aims to minimize recognition loss from the labeled facial images, to faithfully represent inherent AU distribution for both labeled and unlabeled facial images, and to confuse the discriminator. During training, the deep recognition network R and the discriminator D are optimized alternately. Thus, the inherent AU distributions caused by underlying anatomic mechanisms are leveraged to construct better feature representations and AU classifiers from partially AU-labeled data during training. Experiments on two benchmark databases demonstrate that the proposed approach successfully captures AU distributions through adversarial learning and outperforms state-of-the-art AU recognition work.

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。

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