People flow counting method on basis of Kinect

The invention discloses a people flow counting method on the basis of Kinect. The method comprises the following steps of: reading in a current frame of a depth image and setting a threshold value to carry out segmentation on the depth image to obtain a threshold valve segmentation image; carrying out noise removal on the threshold valve segmentation image to obtain a tracked object image; carrying out projection processing on pixels to obtain a tracked object projection image; acquiring an outline sequence of a tracked object communication region from the projection image; acquiring a head tracked object communication region from the tracked object image to form a current frame track point set; judging tracked object affiliation of each track point and updating or newly establishing a track point set of each tracked object; judging whether the track point sets of all the tracked objects meet the tracking counting conditions and updating an entrance and exit counter; and removing the track point sets of the tracked objects who leave from a scene. The method is suitable for people flow counting at various passages, has high counting accuracy, is low in equipment complexity, is not influenced by light variation, shadow, a perspective effect and shielding of the scene and is suitable for people flow counting in different environment places.