1. An apparatus comprising: a processor configured to control one or more processor-executable units; an expression tracking processor unit configured to extract 3D positions of feature points of a facial expression of a face of a user and to track a 3D head movement of the user using the extracted 3D positions of the feature points; a feature point position resetting processor unit configured to reset the 3D position of the feature points of the facial expression with respect to a reference expression of the user looking forward by removing the 3D head movement from the extracted 3D positions of the feature points; and a control point generating processor unit configured to generate expression control points using an expression parameter based on the reset 3D positions of the feature points wherein the 3D head movement comprises movement, scale and rotation of the head of the user.