Attention-enhanced gated recurrent unit for action recognition in tennis 1College of Sports and Health Management, Henan Finance University, Zhengzhou, China 2College of Sports, Zhengzhou University of Light Industry, Zhengzhou, China DOI 10.7717/peerj-cs.1804 Academic Editor Binh Nguyen Subject Areas Human-Computer Interaction, Artificial Intelligence, Computer Vision, Data Mining and Machine Learning, Neural Networks Keywords Computer vision, Deep learning, Action recognition, Tennis...