Infrared weak and small target tracking method based on optical flow and Kalman filtering

The invention provides an infrared weak and small target tracking method based on optical flow and Kalman filtering. The method comprises the following steps: carrying out the angular point tracking of a target mass center position of a previous frame of infrared image based on a current frame of infrared image through an optical flow method, obtaining a current frame of target mass center position, and positioning a more accurate target mass center position through mass center searching; and carrying out target loss judgment on the more accurate target mass center position, and if the target is lost, using a Kalman filter motion model to predict the target mass center position of the current frame of infrared image based on the target mass center position of the previous frame of infrared image. Therefore, under the condition of extremely lack of target features, aiming at the characteristic that the temperature of the infrared weak and small target is higher than that of the surrounding environment, the wea