Vision-based human motion analysis is currently one of the most active research fields
and the human motion recognition is a challenging research topic in this field.Human motion recognition has many promising applications such as intelligent surveillance
perceptual interface and content-based video retrieval.In this paper
the improvements of this topic in the last several years are discussed in detail from three aspects:the category of human motions
motion representation methods and motion recognition methods.At the end of the survey
some vital problems of human motion recognition are presented and analyzed.