微表情是人类试图压抑或隐藏真实情感时泄露的非常短暂的、不能自主控制的面部表情。作为识别谎言的有效线索,微表情可应用于安全、司法、临床等领域。本文概述微表情识别的研究情况,包括微表情识别的心理学研究、自动微表情识别研究和微表情数据库的构建要求,以及微表情表达的研究进展,并展望微表情研究的未来发展方向。 ; Microexpression is a fast and uncontrollable facial movement revealing an emotion that a person tries to conceal. It could be applied to security, forensic investigations, and clinical fields as an effective clue for detecting deceptions. In this paper, we summarize the latest studies on microexpression recogni- tion, including psychological studies, automated microexpression recognition studies, and the requirements for developing a microexpression database. Then we discuss the current progress on microexpression gener- ation research. In addition, the future trends in this field are discussed.