Kalman filter used for handtracking in 3d images. for 2D images the hand position can t be tracked accurately depending upon the illumination conditions, that can be overcomed by using 3D images

3 D hand tracking was advantages when compare to 2D hand tracking.in 2d the images may be not accurate in detection of hand if hte illumination changes, that can be overcomed by using the 3dhand tracking using kalman filter