OpenGait: Revisiting Gait Recognition Toward Better Practicality

Gait recognition is one of the most important long-distance identification technologies and increasingly gains popularity in both research and industry communities. Although significant progress has been made in indoor datasets, much evidence shows that gait recognition techniques perform poorly in the wild. More importantly, we also find that many conclusions from prior works change with the evaluation datasets. Therefore, the more critical goal of this paper is to present a comprehensive benchmark study for better practicality rather than only a particular model for better performance. To this end, we first develop a flexible and efficient gait recognition codebase named OpenGait. Based on OpenGait, we deeply revisit the recent development of gait recognition by re-conducting the ablative experiments. Encouragingly, we find many hidden troubles of prior works and new insights for future research. Inspired by these discoveries, we develop a structurally simple, empirically powerful and practically robust baseline model, GaitBase. Experimentally, we comprehensively compare GaitBase with many current gait recognition methods on multiple public datasets, and the results reflect that GaitBase achieves significantly strong performance in most cases regardless of indoor or outdoor situations. The source code is available at \url{https://github.com/ShiqiYu/OpenGait}.