To overcome the limitations of convolutional neural network in the process of facial expression recognition, a facial expression recognition model Capsule-LSTM based on video frame sequence is proposed. This model is composed of three networks includingcapsule encoders, capsule decoders and LSTM network. The capsule encoder extracts the spatial information of facial expressions in video frames. Capsule decoder reconstructs the images to optimize the network. LSTM extracts the temporal information between video frames and analyzes the differences in expression changes between frames. The experimental results from the MMI dataset show that the Capsule-LSTM model proposed in this paper can effectively improve the accuracy of video expression recognition.
@article{arxiv.2106.07564,
title = {An optimized Capsule-LSTM model for facial expression recognition with video sequences},
author = {Siwei Liu and Yuanpeng Long and Gao Xu and Lijia Yang and Shimei Xu and Xiaoming Yao and Kunxian Shu},
journal= {arXiv preprint arXiv:2106.07564},
year = {2021}
}