Abstract
With the rise of deep learning in the field of compute vision, more and more researchers began to use CNNs for automatic recognition of micro-expressions, and achieved better performance than traditional methods. However, there is a overfitting problem with these methods. CNN focuses on local information and loses the global semantic information in the image. In this paper, we propose a novel micro-expression recognition method based on Apex frame and multi-head self-attention enhanced convolutional network. It consists of three parts: (1) The pre-processing part performs face detection, face alignment, cutting into uniform size and positioning Apex frames on micro-expressions; (2) Optical flow calculation of Apex frames, calculates TVL1 optical flow from Onset frames to Apex frames, and obtains horizontal and vertical optical flow component images; (3) A shallow network (AACNet) is designed to extract and classify the optical flow image components obtained in (2). The results has greatly improved over the benchmark method (LBP-TOP). The state-of-the-art results were achieved on the MEGC2019 database (UF1: 0.7572, UAR: 0.7564).
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Acknowledgements
This work was supported in part by the National Natural Science Foundation of China (No. U1603115),National key R&Dplan project (2017YF C0820702-3) and National Engineering Laboratory for Public Safety Risk Perception and Control by Big Data (XJ201810101).
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Wen, J., Yang, W., Wang, L., Wei, W., Tan, S., Wu, Y. (2021). Cross-database Micro Expression Recognition Based on Apex Frame Optical Flow and Multi-head Self-attention. In: Ning, L., Chau, V., Lau, F. (eds) Parallel Architectures, Algorithms and Programming. PAAP 2020. Communications in Computer and Information Science, vol 1362. Springer, Singapore. https://doi.org/10.1007/978-981-16-0010-4_12
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