Simple human body curve acquisition method based on markers and feature screener

The invention discloses a simple human body curve acquisition method based on markers and a feature screener, and belongs to the technical field of human body part motion curve acquisition methods. The method comprises the following steps: 1) sticking a marker to a key point position; 2) calibrating through a calibration plate to obtain parameters of the camera at a fixed position; 3) collecting acorresponding video file; 4) determining position coordinates of the marker under a pixel coordinate system through a feature filter; 5) converting the position coordinates of the marker in the pixelcoordinate system into the position coordinates in the world coordinate system; and 6) calculating the change of the position coordinates of the key points in the world coordinate system along with time to obtain a human body part motion curve. According to the method, the positions of the key points in the world coordinate system are calculated and determined based on the markers and the featurescreeners, so that the met