Video Emotion Recognition Based on Hierarchical Attention Model

LSTM network is widely used in facial expression recognition of video sequences.In view of the limited representation ability of single-layer LSTM and the limitation of its generalization ability when solving complex problems,a hierarchical attention model is proposed.Hierarchical representation of time series data is learned by stacking LSTM,self-attention mechanism is used to construct differentiated hierarchical relationships,and a penalty term is constructed and further combined with the loss function to optimize the network performance.Experiments on CK+and MMI datasets,demonstrate that due to the construction of good hierarchical features,each step in time series can select information from the more interesting feature hierarchy.Compared with ordinary single-layer LSTM,hierarchical attention model can express the emotional information of video sequences more effectively.