Human behavior analysis has been a challenging research in the field of computer vision

in recent years

to solve the problem of human behavior analysis

introduction of depth sensor provide a new research method. Depth map captured by Microsoft Kinect sensor

firstly

local gradient features extraction of depth map are carried out

in addition

coupled with conditional random field model（ CRF）

put forward a new approach of human behavior analysis. This method is used to effectively recognize several simple human behavior. Experiments are tested on two popular human behavior databases

it verifies that this approach has good recognition result and achieves superior performance.