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arXiv 2005.06040cs.CV
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基于遮挡自适应深度网络的鲁棒人脸表情识别

Occlusion-Adaptive Deep Network for Robust Facial Expression Recognition

University of Maryland, College Park(马里兰大学帕克分校)

Hui Ding, Peng Zhou, Rama Chellappa

摘要:

部分遮挡人脸的表情识别是一个具有挑战性的计算机视觉问题。以前的表情识别方法,要么忽略了这个问题,要么使用极端的假设解决了这个问题。由于人类视觉系统擅长忽略遮挡并专注于非遮挡面部区域,因此我们提出了一个地标引导的注意力分支来查找和丢弃遮挡区域中的损坏特征,以便它们不用于识别。首先生成一个注意力图来指示特定的面部部分是否被遮挡,并引导我们的模型关注未被遮挡的区域。为了进一步提高鲁棒性,我们提出了一个面部区域分支,将特征图划分为不重叠的面部块,并分配每个块来独立预测表情。这导致更多样化和更有区别的特征,使得表情识别系统能够在面部被部分遮挡的情况下恢复。根据这两个分支的协同效应,我们的遮挡自适应深度网络在两个具有挑战性的野外基准数据集和三个真实世界的遮挡表达数据集上的表现明显优于最先进的方法。

英文摘要:

Recognizing the expressions of partially occluded faces is a challenging computer vision problem. Previous expression recognition methods, either overlooked this issue or resolved it using extreme assumptions. Motivated by the fact that the human visual system is adept at ignoring the occlusion and focus on non-occluded facial areas, we propose a landmark-guided attention branch to find and discard corrupted features from occluded regions so that they are not used for recognition. An attention map is first generated to indicate if a specific facial part is occluded and guide our model to attend to non-occluded regions. To further improve robustness, we propose a facial region branch to partition the feature maps into non-overlapping facial blocks and task each block to predict the expression independently. This results in more diverse and discriminative features, enabling the expression recognition system to recover even though the face is partially occluded. Depending on the synergistic effects of the two branches, our occlusion-adaptive deep network significantly outperforms state-of-the-art methods on two challenging in-the-wild benchmark datasets and three real-world occluded expression datasets.

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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