Abstract
Micro-expressions typically reflect suppressed feelings and they can provide an accurate indication of the real feelings and motivations of a person. Accordingly, they have been used for clinical diagnosis, business negotiations, interrogations, and security research. However, it is difficult to detect micro-expressions because of their instantaneity and imperceptibility. Therefore, micro-expression recognition is challenging. So far, various micro-expression recognition algorithms have been proposed to improve micro-expression recognition performance, which LBP, optical flow method and deep learning methods have made good progress as mainstream algorithms. In this survey, we aim to provide a review of micro-expression recognition based on LBP, optical flow, and deep learning. We first introduce the current commonly used micro-expression datasets. Then the three mainstream classical methods, LBP, optical flow, and deep learning, are described and summarized respectively. The existing methods in the last 5 years are discussed in regard to datasets, pre-processing, evaluation metrics and accuracy. Finally, we explain the shortcomings and challenges of micro-expression recognition and propose the future directions. This can help researchers to more quickly understand the current status of research, problems and future development directions, and provide a reference point for further research.
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This work was supported in part by the National Natural Science Foundation of China (Nos. 61472330 and 61872301).
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Zeng, X., Zhao, X., Zhong, X. et al. A Survey of Micro-expression Recognition Methods Based on LBP, Optical Flow and Deep Learning. Neural Process Lett 55, 5995–6026 (2023). https://doi.org/10.1007/s11063-022-11123-x
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DOI: https://doi.org/10.1007/s11063-022-11123-x