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arXiv 2007.12421cs.CV
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微表情点样:新的基准

Micro-expression spotting: A new benchmark

University of Oulu(奥卢大学);Xi’an Jiaotong University(西安交通大学)

Thuong-Khanh Tran, Quang-Nhat Vo, Xiaopeng Hong, Xiaobai Li, Guoying Zhao

摘要:

微表情(Micro-expressions,ME)是人们试图隐藏真实感受或隐藏情绪时出现的短暂而不自觉的面部表情。基于心理学研究,ME在理解真实情绪方面起着重要作用,这导致了许多潜在的应用。因此,ME分析已成为心理学、执法和心理治疗等各个研究领域的一个有吸引力的话题。在计算机视觉领域,对运动元的研究主要分为两个方面:运动元的定位和运动元的识别,分别用于确定运动元在视频中的位置和运动元的情感类别。最近,虽然已经做了大量的研究,但由于两个主要原因,尚未在实际层面上构建用于分析ME的全自动系统:大多数关于ME的研究仅关注识别部分,而放弃了斑点任务;当前用于ME斑点的公共数据集不具有足够的挑战性以支持开发鲁棒的斑点算法。本文的贡献有三个方面:(1)我们介绍了SMIC-E数据库的扩展,即SMIC-E-Long数据库,它是ME点样的一个新的具有挑战性的基准:(2)我们提出了一个新的评估协议,它对各种ME点样技术进行了比较;(3)在SMIC-E-Long数据库上使用手工制作和基于深度学习的方法进行广泛的实验,以进行基线评估。

英文摘要:

Micro-expressions (MEs) are brief and involuntary facial expressions that occur when people are trying to hide their true feelings or conceal their emotions. Based on psychology research, MEs play an important role in understanding genuine emotions, which leads to many potential applications. Therefore, ME analysis has become an attractive topic for various research areas, such as psychology, law enforcement, and psychotherapy. In the computer vision field, the study of MEs can be divided into two main tasks, spotting and recognition, which are used to identify positions of MEs in videos and determine the emotion category of the detected MEs, respectively. Recently, although much research has been done, no fully automatic system for analyzing MEs has yet been constructed on a practical level for two main reasons: most of the research on MEs only focuses on the recognition part, while abandoning the spotting task; current public datasets for ME spotting are not challenging enough to support developing a robust spotting algorithm. The contributions of this paper are threefold: (1) we introduce an extension of the SMIC-E database, namely the SMIC-E-Long database, which is a new challenging benchmark for ME spotting; (2) we suggest a new evaluation protocol that standardizes the comparison of various ME spotting techniques; (3) extensive experiments with handcrafted and deep learning-based approaches on the SMIC-E-Long database are performed for baseline evaluation.

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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